']\n\t\t};\n\n\t\ttranslations.thead = translations.tfoot = translations.tbody;\n\n\t\treturn function(html){\n\t\t\tvar wrap = translations[this.get('tag')];\n\t\t\tif (!wrap && !supportsHTML5Elements) wrap = [0, '', ''];\n\t\t\tif (!wrap) return set.call(this, html);\n\n\t\t\tvar level = wrap[0], wrapper = document.createElement('div'), target = wrapper;\n\t\t\tif (!supportsHTML5Elements) fragment.appendChild(wrapper);\n\t\t\twrapper.innerHTML = [wrap[1], html, wrap[2]].flatten().join('');\n\t\t\twhile (level--) target = target.firstChild;\n\t\t\tthis.empty().adopt(target.childNodes);\n\t\t\tif (!supportsHTML5Elements) fragment.removeChild(wrapper);\n\t\t\twrapper = null;\n\t\t};\n\n\t})(Element.Properties.html.set);\n}\n/**/\n\n/**/\nvar testForm = document.createElement('form');\ntestForm.innerHTML = '';\n\nif (testForm.firstChild.value != 's') Element.Properties.value = {\n\n\tset: function(value){\n\t\tvar tag = this.get('tag');\n\t\tif (tag != 'select') return this.setProperty('value', value);\n\t\tvar options = this.getElements('option');\n\t\tfor (var i = 0; i < options.length; i++){\n\t\t\tvar option = options[i],\n\t\t\t\tattr = option.getAttributeNode('value'),\n\t\t\t\toptionValue = (attr && attr.specified) ? option.value : option.get('text');\n\t\t\tif (optionValue == value) return option.selected = true;\n\t\t}\n\t},\n\n\tget: function(){\n\t\tvar option = this, tag = option.get('tag');\n\n\t\tif (tag != 'select' && tag != 'option') return this.getProperty('value');\n\n\t\tif (tag == 'select' && !(option = option.getSelected()[0])) return '';\n\n\t\tvar attr = option.getAttributeNode('value');\n\t\treturn (attr && attr.specified) ? option.value : option.get('text');\n\t}\n\n};\ntestForm = null;\n/**/\n\n/**/\nif (document.createElement('div').getAttributeNode('id')) Element.Properties.id = {\n\tset: function(id){\n\t\tthis.id = this.getAttributeNode('id').value = id;\n\t},\n\tget: function(){\n\t\treturn this.id || null;\n\t},\n\terase: function(){\n\t\tthis.id = this.getAttributeNode('id').value = '';\n\t}\n};\n/**/\n\n})();\n\n\n/*\n---\n\nname: Element.Style\n\ndescription: Contains methods for interacting with the styles of Elements in a fashionable way.\n\nlicense: MIT-style license.\n\nrequires: Element\n\nprovides: Element.Style\n\n...\n*/\n\n(function(){\n\nvar html = document.html;\n\n//\n// Check for oldIE, which does not remove styles when they're set to null\nvar el = document.createElement('div');\nel.style.color = 'red';\nel.style.color = null;\nvar doesNotRemoveStyles = el.style.color == 'red';\nel = null;\n//\n\nElement.Properties.styles = {set: function(styles){\n\tthis.setStyles(styles);\n}};\n\nvar hasOpacity = (html.style.opacity != null),\n\thasFilter = (html.style.filter != null),\n\treAlpha = /alpha\\(opacity=([\\d.]+)\\)/i;\n\nvar setVisibility = function(element, opacity){\n\telement.store('$opacity', opacity);\n\telement.style.visibility = opacity > 0 || opacity == null ? 'visible' : 'hidden';\n};\n\nvar setOpacity = (hasOpacity ? function(element, opacity){\n\telement.style.opacity = opacity;\n} : (hasFilter ? function(element, opacity){\n\tvar style = element.style;\n\tif (!element.currentStyle || !element.currentStyle.hasLayout) style.zoom = 1;\n\tif (opacity == null || opacity == 1) opacity = '';\n\telse opacity = 'alpha(opacity=' + (opacity * 100).limit(0, 100).round() + ')';\n\tvar filter = style.filter || element.getComputedStyle('filter') || '';\n\tstyle.filter = reAlpha.test(filter) ? filter.replace(reAlpha, opacity) : filter + opacity;\n\tif (!style.filter) style.removeAttribute('filter');\n} : setVisibility));\n\nvar getOpacity = (hasOpacity ? function(element){\n\tvar opacity = element.style.opacity || element.getComputedStyle('opacity');\n\treturn (opacity == '') ? 1 : opacity.toFloat();\n} : (hasFilter ? function(element){\n\tvar filter = (element.style.filter || element.getComputedStyle('filter')),\n\t\topacity;\n\tif (filter) opacity = filter.match(reAlpha);\n\treturn (opacity == null || filter == null) ? 1 : (opacity[1] / 100);\n} : function(element){\n\tvar opacity = element.retrieve('$opacity');\n\tif (opacity == null) opacity = (element.style.visibility == 'hidden' ? 0 : 1);\n\treturn opacity;\n}));\n\nvar floatName = (html.style.cssFloat == null) ? 'styleFloat' : 'cssFloat';\n\nElement.implement({\n\n\tgetComputedStyle: function(property){\n\t\tif (this.currentStyle) return this.currentStyle[property.camelCase()];\n\t\tvar defaultView = Element.getDocument(this).defaultView,\n\t\t\tcomputed = defaultView ? defaultView.getComputedStyle(this, null) : null;\n\t\treturn (computed) ? computed.getPropertyValue((property == floatName) ? 'float' : property.hyphenate()) : null;\n\t},\n\n\tsetStyle: function(property, value){\n\t\tif (property == 'opacity'){\n\t\t\tif (value != null) value = parseFloat(value);\n\t\t\tsetOpacity(this, value);\n\t\t\treturn this;\n\t\t}\n\t\tproperty = (property == 'float' ? floatName : property).camelCase();\n\t\tif (typeOf(value) != 'string'){\n\t\t\tvar map = (Element.Styles[property] || '@').split(' ');\n\t\t\tvalue = Array.from(value).map(function(val, i){\n\t\t\t\tif (!map[i]) return '';\n\t\t\t\treturn (typeOf(val) == 'number') ? map[i].replace('@', Math.round(val)) : val;\n\t\t\t}).join(' ');\n\t\t} else if (value == String(Number(value))){\n\t\t\tvalue = Math.round(value);\n\t\t}\n\t\tthis.style[property] = value;\n\t\t//\n\t\tif ((value == '' || value == null) && doesNotRemoveStyles && this.style.removeAttribute){\n\t\t\tthis.style.removeAttribute(property);\n\t\t}\n\t\t//\n\t\treturn this;\n\t},\n\n\tgetStyle: function(property){\n\t\tif (property == 'opacity') return getOpacity(this);\n\t\tproperty = (property == 'float' ? floatName : property).camelCase();\n\t\tvar result = this.style[property];\n\t\tif (!result || property == 'zIndex'){\n\t\t\tresult = [];\n\t\t\tfor (var style in Element.ShortStyles){\n\t\t\t\tif (property != style) continue;\n\t\t\t\tfor (var s in Element.ShortStyles[style]) result.push(this.getStyle(s));\n\t\t\t\treturn result.join(' ');\n\t\t\t}\n\t\t\tresult = this.getComputedStyle(property);\n\t\t}\n\t\tif (result){\n\t\t\tresult = String(result);\n\t\t\tvar color = result.match(/rgba?\\([\\d\\s,]+\\)/);\n\t\t\tif (color) result = result.replace(color[0], color[0].rgbToHex());\n\t\t}\n\t\tif (Browser.ie && isNaN(parseFloat(result))){\n\t\t\tif ((/^(height|width)$/).test(property)){\n\t\t\t\tvar values = (property == 'width') ? ['left', 'right'] : ['top', 'bottom'], size = 0;\n\t\t\t\tvalues.each(function(value){\n\t\t\t\t\tsize += this.getStyle('border-' + value + '-width').toInt() + this.getStyle('padding-' + value).toInt();\n\t\t\t\t}, this);\n\t\t\t\treturn this['offset' + property.capitalize()] - size + 'px';\n\t\t\t}\n\t\t\tif (Browser.opera && String(result).indexOf('px') != -1) return result;\n\t\t\tif ((/^border(.+)Width|margin|padding/).test(property)) return '0px';\n\t\t}\n\t\treturn result;\n\t},\n\n\tsetStyles: function(styles){\n\t\tfor (var style in styles) this.setStyle(style, styles[style]);\n\t\treturn this;\n\t},\n\n\tgetStyles: function(){\n\t\tvar result = {};\n\t\tArray.flatten(arguments).each(function(key){\n\t\t\tresult[key] = this.getStyle(key);\n\t\t}, this);\n\t\treturn result;\n\t}\n\n});\n\nElement.Styles = {\n\tleft: '@px', top: '@px', bottom: '@px', right: '@px',\n\twidth: '@px', height: '@px', maxWidth: '@px', maxHeight: '@px', minWidth: '@px', minHeight: '@px',\n\tbackgroundColor: 'rgb(@, @, @)', backgroundPosition: '@px @px', color: 'rgb(@, @, @)',\n\tfontSize: '@px', letterSpacing: '@px', lineHeight: '@px', clip: 'rect(@px @px @px @px)',\n\tmargin: '@px @px @px @px', padding: '@px @px @px @px', border: '@px @ rgb(@, @, @) @px @ rgb(@, @, @) @px @ rgb(@, @, @)',\n\tborderWidth: '@px @px @px @px', borderStyle: '@ @ @ @', borderColor: 'rgb(@, @, @) rgb(@, @, @) rgb(@, @, @) rgb(@, @, @)',\n\tzIndex: '@', 'zoom': '@', fontWeight: '@', textIndent: '@px', opacity: '@'\n};\n\n\n\n\n\nElement.ShortStyles = {margin: {}, padding: {}, border: {}, borderWidth: {}, borderStyle: {}, borderColor: {}};\n\n['Top', 'Right', 'Bottom', 'Left'].each(function(direction){\n\tvar Short = Element.ShortStyles;\n\tvar All = Element.Styles;\n\t['margin', 'padding'].each(function(style){\n\t\tvar sd = style + direction;\n\t\tShort[style][sd] = All[sd] = '@px';\n\t});\n\tvar bd = 'border' + direction;\n\tShort.border[bd] = All[bd] = '@px @ rgb(@, @, @)';\n\tvar bdw = bd + 'Width', bds = bd + 'Style', bdc = bd + 'Color';\n\tShort[bd] = {};\n\tShort.borderWidth[bdw] = Short[bd][bdw] = All[bdw] = '@px';\n\tShort.borderStyle[bds] = Short[bd][bds] = All[bds] = '@';\n\tShort.borderColor[bdc] = Short[bd][bdc] = All[bdc] = 'rgb(@, @, @)';\n});\n\n})();\n\n\n/*\n---\n\nname: Element.Event\n\ndescription: Contains Element methods for dealing with events. This file also includes mouseenter and mouseleave custom Element Events, if necessary.\n\nlicense: MIT-style license.\n\nrequires: [Element, Event]\n\nprovides: Element.Event\n\n...\n*/\n\n(function(){\n\nElement.Properties.events = {set: function(events){\n\tthis.addEvents(events);\n}};\n\n[Element, Window, Document].invoke('implement', {\n\n\taddEvent: function(type, fn){\n\t\tvar events = this.retrieve('events', {});\n\t\tif (!events[type]) events[type] = {keys: [], values: []};\n\t\tif (events[type].keys.contains(fn)) return this;\n\t\tevents[type].keys.push(fn);\n\t\tvar realType = type,\n\t\t\tcustom = Element.Events[type],\n\t\t\tcondition = fn,\n\t\t\tself = this;\n\t\tif (custom){\n\t\t\tif (custom.onAdd) custom.onAdd.call(this, fn, type);\n\t\t\tif (custom.condition){\n\t\t\t\tcondition = function(event){\n\t\t\t\t\tif (custom.condition.call(this, event, type)) return fn.call(this, event);\n\t\t\t\t\treturn true;\n\t\t\t\t};\n\t\t\t}\n\t\t\tif (custom.base) realType = Function.from(custom.base).call(this, type);\n\t\t}\n\t\tvar defn = function(){\n\t\t\treturn fn.call(self);\n\t\t};\n\t\tvar nativeEvent = Element.NativeEvents[realType];\n\t\tif (nativeEvent){\n\t\t\tif (nativeEvent == 2){\n\t\t\t\tdefn = function(event){\n\t\t\t\t\tevent = new DOMEvent(event, self.getWindow());\n\t\t\t\t\tif (condition.call(self, event) === false) event.stop();\n\t\t\t\t};\n\t\t\t}\n\t\t\tthis.addListener(realType, defn, arguments[2]);\n\t\t}\n\t\tevents[type].values.push(defn);\n\t\treturn this;\n\t},\n\n\tremoveEvent: function(type, fn){\n\t\tvar events = this.retrieve('events');\n\t\tif (!events || !events[type]) return this;\n\t\tvar list = events[type];\n\t\tvar index = list.keys.indexOf(fn);\n\t\tif (index == -1) return this;\n\t\tvar value = list.values[index];\n\t\tdelete list.keys[index];\n\t\tdelete list.values[index];\n\t\tvar custom = Element.Events[type];\n\t\tif (custom){\n\t\t\tif (custom.onRemove) custom.onRemove.call(this, fn, type);\n\t\t\tif (custom.base) type = Function.from(custom.base).call(this, type);\n\t\t}\n\t\treturn (Element.NativeEvents[type]) ? this.removeListener(type, value, arguments[2]) : this;\n\t},\n\n\taddEvents: function(events){\n\t\tfor (var event in events) this.addEvent(event, events[event]);\n\t\treturn this;\n\t},\n\n\tremoveEvents: function(events){\n\t\tvar type;\n\t\tif (typeOf(events) == 'object'){\n\t\t\tfor (type in events) this.removeEvent(type, events[type]);\n\t\t\treturn this;\n\t\t}\n\t\tvar attached = this.retrieve('events');\n\t\tif (!attached) return this;\n\t\tif (!events){\n\t\t\tfor (type in attached) this.removeEvents(type);\n\t\t\tthis.eliminate('events');\n\t\t} else if (attached[events]){\n\t\t\tattached[events].keys.each(function(fn){\n\t\t\t\tthis.removeEvent(events, fn);\n\t\t\t}, this);\n\t\t\tdelete attached[events];\n\t\t}\n\t\treturn this;\n\t},\n\n\tfireEvent: function(type, args, delay){\n\t\tvar events = this.retrieve('events');\n\t\tif (!events || !events[type]) return this;\n\t\targs = Array.from(args);\n\n\t\tevents[type].keys.each(function(fn){\n\t\t\tif (delay) fn.delay(delay, this, args);\n\t\t\telse fn.apply(this, args);\n\t\t}, this);\n\t\treturn this;\n\t},\n\n\tcloneEvents: function(from, type){\n\t\tfrom = document.id(from);\n\t\tvar events = from.retrieve('events');\n\t\tif (!events) return this;\n\t\tif (!type){\n\t\t\tfor (var eventType in events) this.cloneEvents(from, eventType);\n\t\t} else if (events[type]){\n\t\t\tevents[type].keys.each(function(fn){\n\t\t\t\tthis.addEvent(type, fn);\n\t\t\t}, this);\n\t\t}\n\t\treturn this;\n\t}\n\n});\n\nElement.NativeEvents = {\n\tclick: 2, dblclick: 2, mouseup: 2, mousedown: 2, contextmenu: 2, //mouse buttons\n\tmousewheel: 2, DOMMouseScroll: 2, //mouse wheel\n\tmouseover: 2, mouseout: 2, mousemove: 2, selectstart: 2, selectend: 2, //mouse movement\n\tkeydown: 2, keypress: 2, keyup: 2, //keyboard\n\torientationchange: 2, // mobile\n\ttouchstart: 2, touchmove: 2, touchend: 2, touchcancel: 2, // touch\n\tgesturestart: 2, gesturechange: 2, gestureend: 2, // gesture\n\tfocus: 2, blur: 2, change: 2, reset: 2, select: 2, submit: 2, paste: 2, input: 2, //form elements\n\tload: 2, unload: 1, beforeunload: 2, resize: 1, move: 1, DOMContentLoaded: 1, readystatechange: 1, //window\n\terror: 1, abort: 1, scroll: 1 //misc\n};\n\nElement.Events = {mousewheel: {\n\tbase: (Browser.firefox) ? 'DOMMouseScroll' : 'mousewheel'\n}};\n\nif ('onmouseenter' in document.documentElement){\n\tElement.NativeEvents.mouseenter = Element.NativeEvents.mouseleave = 2;\n} else {\n\tvar check = function(event){\n\t\tvar related = event.relatedTarget;\n\t\tif (related == null) return true;\n\t\tif (!related) return false;\n\t\treturn (related != this && related.prefix != 'xul' && typeOf(this) != 'document' && !this.contains(related));\n\t};\n\n\tElement.Events.mouseenter = {\n\t\tbase: 'mouseover',\n\t\tcondition: check\n\t};\n\n\tElement.Events.mouseleave = {\n\t\tbase: 'mouseout',\n\t\tcondition: check\n\t};\n}\n\n/**/\nif (!window.addEventListener){\n\tElement.NativeEvents.propertychange = 2;\n\tElement.Events.change = {\n\t\tbase: function(){\n\t\t\tvar type = this.type;\n\t\t\treturn (this.get('tag') == 'input' && (type == 'radio' || type == 'checkbox')) ? 'propertychange' : 'change'\n\t\t},\n\t\tcondition: function(event){\n\t\t\treturn this.type != 'radio' || (event.event.propertyName == 'checked' && this.checked);\n\t\t}\n\t}\n}\n/**/\n\n\n\n})();\n\n\n/*\n---\n\nname: Element.Delegation\n\ndescription: Extends the Element native object to include the delegate method for more efficient event management.\n\nlicense: MIT-style license.\n\nrequires: [Element.Event]\n\nprovides: [Element.Delegation]\n\n...\n*/\n\n(function(){\n\nvar eventListenerSupport = !!window.addEventListener;\n\nElement.NativeEvents.focusin = Element.NativeEvents.focusout = 2;\n\nvar bubbleUp = function(self, match, fn, event, target){\n\twhile (target && target != self){\n\t\tif (match(target, event)) return fn.call(target, event, target);\n\t\ttarget = document.id(target.parentNode);\n\t}\n};\n\nvar map = {\n\tmouseenter: {\n\t\tbase: 'mouseover'\n\t},\n\tmouseleave: {\n\t\tbase: 'mouseout'\n\t},\n\tfocus: {\n\t\tbase: 'focus' + (eventListenerSupport ? '' : 'in'),\n\t\tcapture: true\n\t},\n\tblur: {\n\t\tbase: eventListenerSupport ? 'blur' : 'focusout',\n\t\tcapture: true\n\t}\n};\n\n/**/\nvar _key = '$delegation:';\nvar formObserver = function(type){\n\n\treturn {\n\n\t\tbase: 'focusin',\n\n\t\tremove: function(self, uid){\n\t\t\tvar list = self.retrieve(_key + type + 'listeners', {})[uid];\n\t\t\tif (list && list.forms) for (var i = list.forms.length; i--;){\n\t\t\t\tlist.forms[i].removeEvent(type, list.fns[i]);\n\t\t\t}\n\t\t},\n\n\t\tlisten: function(self, match, fn, event, target, uid){\n\t\t\tvar form = (target.get('tag') == 'form') ? target : event.target.getParent('form');\n\t\t\tif (!form) return;\n\n\t\t\tvar listeners = self.retrieve(_key + type + 'listeners', {}),\n\t\t\t\tlistener = listeners[uid] || {forms: [], fns: []},\n\t\t\t\tforms = listener.forms, fns = listener.fns;\n\n\t\t\tif (forms.indexOf(form) != -1) return;\n\t\t\tforms.push(form);\n\n\t\t\tvar _fn = function(event){\n\t\t\t\tbubbleUp(self, match, fn, event, target);\n\t\t\t};\n\t\t\tform.addEvent(type, _fn);\n\t\t\tfns.push(_fn);\n\n\t\t\tlisteners[uid] = listener;\n\t\t\tself.store(_key + type + 'listeners', listeners);\n\t\t}\n\t};\n};\n\nvar inputObserver = function(type){\n\treturn {\n\t\tbase: 'focusin',\n\t\tlisten: function(self, match, fn, event, target){\n\t\t\tvar events = {blur: function(){\n\t\t\t\tthis.removeEvents(events);\n\t\t\t}};\n\t\t\tevents[type] = function(event){\n\t\t\t\tbubbleUp(self, match, fn, event, target);\n\t\t\t};\n\t\t\tevent.target.addEvents(events);\n\t\t}\n\t};\n};\n\nif (!eventListenerSupport) Object.append(map, {\n\tsubmit: formObserver('submit'),\n\treset: formObserver('reset'),\n\tchange: inputObserver('change'),\n\tselect: inputObserver('select')\n});\n/**/\n\nvar proto = Element.prototype,\n\taddEvent = proto.addEvent,\n\tremoveEvent = proto.removeEvent;\n\nvar relay = function(old, method){\n\treturn function(type, fn, useCapture){\n\t\tif (type.indexOf(':relay') == -1) return old.call(this, type, fn, useCapture);\n\t\tvar parsed = Slick.parse(type).expressions[0][0];\n\t\tif (parsed.pseudos[0].key != 'relay') return old.call(this, type, fn, useCapture);\n\t\tvar newType = parsed.tag;\n\t\tparsed.pseudos.slice(1).each(function(pseudo){\n\t\t\tnewType += ':' + pseudo.key + (pseudo.value ? '(' + pseudo.value + ')' : '');\n\t\t});\n\t\told.call(this, type, fn);\n\t\treturn method.call(this, newType, parsed.pseudos[0].value, fn);\n\t};\n};\n\nvar delegation = {\n\n\taddEvent: function(type, match, fn){\n\t\tvar storage = this.retrieve('$delegates', {}), stored = storage[type];\n\t\tif (stored) for (var _uid in stored){\n\t\t\tif (stored[_uid].fn == fn && stored[_uid].match == match) return this;\n\t\t}\n\n\t\tvar _type = type, _match = match, _fn = fn, _map = map[type] || {};\n\t\ttype = _map.base || _type;\n\n\t\tmatch = function(target){\n\t\t\treturn Slick.match(target, _match);\n\t\t};\n\n\t\tvar elementEvent = Element.Events[_type];\n\t\tif (elementEvent && elementEvent.condition){\n\t\t\tvar __match = match, condition = elementEvent.condition;\n\t\t\tmatch = function(target, event){\n\t\t\t\treturn __match(target, event) && condition.call(target, event, type);\n\t\t\t};\n\t\t}\n\n\t\tvar self = this, uid = String.uniqueID();\n\t\tvar delegator = _map.listen ? function(event, target){\n\t\t\tif (!target && event && event.target) target = event.target;\n\t\t\tif (target) _map.listen(self, match, fn, event, target, uid);\n\t\t} : function(event, target){\n\t\t\tif (!target && event && event.target) target = event.target;\n\t\t\tif (target) bubbleUp(self, match, fn, event, target);\n\t\t};\n\n\t\tif (!stored) stored = {};\n\t\tstored[uid] = {\n\t\t\tmatch: _match,\n\t\t\tfn: _fn,\n\t\t\tdelegator: delegator\n\t\t};\n\t\tstorage[_type] = stored;\n\t\treturn addEvent.call(this, type, delegator, _map.capture);\n\t},\n\n\tremoveEvent: function(type, match, fn, _uid){\n\t\tvar storage = this.retrieve('$delegates', {}), stored = storage[type];\n\t\tif (!stored) return this;\n\n\t\tif (_uid){\n\t\t\tvar _type = type, delegator = stored[_uid].delegator, _map = map[type] || {};\n\t\t\ttype = _map.base || _type;\n\t\t\tif (_map.remove) _map.remove(this, _uid);\n\t\t\tdelete stored[_uid];\n\t\t\tstorage[_type] = stored;\n\t\t\treturn removeEvent.call(this, type, delegator);\n\t\t}\n\n\t\tvar __uid, s;\n\t\tif (fn) for (__uid in stored){\n\t\t\ts = stored[__uid];\n\t\t\tif (s.match == match && s.fn == fn) return delegation.removeEvent.call(this, type, match, fn, __uid);\n\t\t} else for (__uid in stored){\n\t\t\ts = stored[__uid];\n\t\t\tif (s.match == match) delegation.removeEvent.call(this, type, match, s.fn, __uid);\n\t\t}\n\t\treturn this;\n\t}\n\n};\n\n[Element, Window, Document].invoke('implement', {\n\taddEvent: relay(addEvent, delegation.addEvent),\n\tremoveEvent: relay(removeEvent, delegation.removeEvent)\n});\n\n})();\n\n\n/*\n---\n\nname: Element.Dimensions\n\ndescription: Contains methods to work with size, scroll, or positioning of Elements and the window object.\n\nlicense: MIT-style license.\n\ncredits:\n - Element positioning based on the [qooxdoo](http://qooxdoo.org/) code and smart browser fixes, [LGPL License](http://www.gnu.org/licenses/lgpl.html).\n - Viewport dimensions based on [YUI](http://developer.yahoo.com/yui/) code, [BSD License](http://developer.yahoo.com/yui/license.html).\n\nrequires: [Element, Element.Style]\n\nprovides: [Element.Dimensions]\n\n...\n*/\n\n(function(){\n\nvar element = document.createElement('div'),\n\tchild = document.createElement('div');\nelement.style.height = '0';\nelement.appendChild(child);\nvar brokenOffsetParent = (child.offsetParent === element);\nelement = child = null;\n\nvar isOffset = function(el){\n\treturn styleString(el, 'position') != 'static' || isBody(el);\n};\n\nvar isOffsetStatic = function(el){\n\treturn isOffset(el) || (/^(?:table|td|th)$/i).test(el.tagName);\n};\n\nElement.implement({\n\n\tscrollTo: function(x, y){\n\t\tif (isBody(this)){\n\t\t\tthis.getWindow().scrollTo(x, y);\n\t\t} else {\n\t\t\tthis.scrollLeft = x;\n\t\t\tthis.scrollTop = y;\n\t\t}\n\t\treturn this;\n\t},\n\n\tgetSize: function(){\n\t\tif (isBody(this)) return this.getWindow().getSize();\n\t\treturn {x: this.offsetWidth, y: this.offsetHeight};\n\t},\n\n\tgetScrollSize: function(){\n\t\tif (isBody(this)) return this.getWindow().getScrollSize();\n\t\treturn {x: this.scrollWidth, y: this.scrollHeight};\n\t},\n\n\tgetScroll: function(){\n\t\tif (isBody(this)) return this.getWindow().getScroll();\n\t\treturn {x: this.scrollLeft, y: this.scrollTop};\n\t},\n\n\tgetScrolls: function(){\n\t\tvar element = this.parentNode, position = {x: 0, y: 0};\n\t\twhile (element && !isBody(element)){\n\t\t\tposition.x += element.scrollLeft;\n\t\t\tposition.y += element.scrollTop;\n\t\t\telement = element.parentNode;\n\t\t}\n\t\treturn position;\n\t},\n\n\tgetOffsetParent: brokenOffsetParent ? function(){\n\t\tvar element = this;\n\t\tif (isBody(element) || styleString(element, 'position') == 'fixed') return null;\n\n\t\tvar isOffsetCheck = (styleString(element, 'position') == 'static') ? isOffsetStatic : isOffset;\n\t\twhile ((element = element.parentNode)){\n\t\t\tif (isOffsetCheck(element)) return element;\n\t\t}\n\t\treturn null;\n\t} : function(){\n\t\tvar element = this;\n\t\tif (isBody(element) || styleString(element, 'position') == 'fixed') return null;\n\n\t\ttry {\n\t\t\treturn element.offsetParent;\n\t\t} catch(e) {}\n\t\treturn null;\n\t},\n\n\tgetOffsets: function(){\n\t\tif (this.getBoundingClientRect && !Browser.Platform.ios){\n\t\t\tvar bound = this.getBoundingClientRect(),\n\t\t\t\thtml = document.id(this.getDocument().documentElement),\n\t\t\t\thtmlScroll = html.getScroll(),\n\t\t\t\telemScrolls = this.getScrolls(),\n\t\t\t\tisFixed = (styleString(this, 'position') == 'fixed');\n\n\t\t\treturn {\n\t\t\t\tx: bound.left.toInt() + elemScrolls.x + ((isFixed) ? 0 : htmlScroll.x) - html.clientLeft,\n\t\t\t\ty: bound.top.toInt() + elemScrolls.y + ((isFixed) ? 0 : htmlScroll.y) - html.clientTop\n\t\t\t};\n\t\t}\n\n\t\tvar element = this, position = {x: 0, y: 0};\n\t\tif (isBody(this)) return position;\n\n\t\twhile (element && !isBody(element)){\n\t\t\tposition.x += element.offsetLeft;\n\t\t\tposition.y += element.offsetTop;\n\n\t\t\tif (Browser.firefox){\n\t\t\t\tif (!borderBox(element)){\n\t\t\t\t\tposition.x += leftBorder(element);\n\t\t\t\t\tposition.y += topBorder(element);\n\t\t\t\t}\n\t\t\t\tvar parent = element.parentNode;\n\t\t\t\tif (parent && styleString(parent, 'overflow') != 'visible'){\n\t\t\t\t\tposition.x += leftBorder(parent);\n\t\t\t\t\tposition.y += topBorder(parent);\n\t\t\t\t}\n\t\t\t} else if (element != this && Browser.safari){\n\t\t\t\tposition.x += leftBorder(element);\n\t\t\t\tposition.y += topBorder(element);\n\t\t\t}\n\n\t\t\telement = element.offsetParent;\n\t\t}\n\t\tif (Browser.firefox && !borderBox(this)){\n\t\t\tposition.x -= leftBorder(this);\n\t\t\tposition.y -= topBorder(this);\n\t\t}\n\t\treturn position;\n\t},\n\n\tgetPosition: function(relative){\n\t\tvar offset = this.getOffsets(),\n\t\t\tscroll = this.getScrolls();\n\t\tvar position = {\n\t\t\tx: offset.x - scroll.x,\n\t\t\ty: offset.y - scroll.y\n\t\t};\n\n\t\tif (relative && (relative = document.id(relative))){\n\t\t\tvar relativePosition = relative.getPosition();\n\t\t\treturn {x: position.x - relativePosition.x - leftBorder(relative), y: position.y - relativePosition.y - topBorder(relative)};\n\t\t}\n\t\treturn position;\n\t},\n\n\tgetCoordinates: function(element){\n\t\tif (isBody(this)) return this.getWindow().getCoordinates();\n\t\tvar position = this.getPosition(element),\n\t\t\tsize = this.getSize();\n\t\tvar obj = {\n\t\t\tleft: position.x,\n\t\t\ttop: position.y,\n\t\t\twidth: size.x,\n\t\t\theight: size.y\n\t\t};\n\t\tobj.right = obj.left + obj.width;\n\t\tobj.bottom = obj.top + obj.height;\n\t\treturn obj;\n\t},\n\n\tcomputePosition: function(obj){\n\t\treturn {\n\t\t\tleft: obj.x - styleNumber(this, 'margin-left'),\n\t\t\ttop: obj.y - styleNumber(this, 'margin-top')\n\t\t};\n\t},\n\n\tsetPosition: function(obj){\n\t\treturn this.setStyles(this.computePosition(obj));\n\t}\n\n});\n\n\n[Document, Window].invoke('implement', {\n\n\tgetSize: function(){\n\t\tvar doc = getCompatElement(this);\n\t\treturn {x: doc.clientWidth, y: doc.clientHeight};\n\t},\n\n\tgetScroll: function(){\n\t\tvar win = this.getWindow(), doc = getCompatElement(this);\n\t\treturn {x: win.pageXOffset || doc.scrollLeft, y: win.pageYOffset || doc.scrollTop};\n\t},\n\n\tgetScrollSize: function(){\n\t\tvar doc = getCompatElement(this),\n\t\t\tmin = this.getSize(),\n\t\t\tbody = this.getDocument().body;\n\n\t\treturn {x: Math.max(doc.scrollWidth, body.scrollWidth, min.x), y: Math.max(doc.scrollHeight, body.scrollHeight, min.y)};\n\t},\n\n\tgetPosition: function(){\n\t\treturn {x: 0, y: 0};\n\t},\n\n\tgetCoordinates: function(){\n\t\tvar size = this.getSize();\n\t\treturn {top: 0, left: 0, bottom: size.y, right: size.x, height: size.y, width: size.x};\n\t}\n\n});\n\n// private methods\n\nvar styleString = Element.getComputedStyle;\n\nfunction styleNumber(element, style){\n\treturn styleString(element, style).toInt() || 0;\n}\n\nfunction borderBox(element){\n\treturn styleString(element, '-moz-box-sizing') == 'border-box';\n}\n\nfunction topBorder(element){\n\treturn styleNumber(element, 'border-top-width');\n}\n\nfunction leftBorder(element){\n\treturn styleNumber(element, 'border-left-width');\n}\n\nfunction isBody(element){\n\treturn (/^(?:body|html)$/i).test(element.tagName);\n}\n\nfunction getCompatElement(element){\n\tvar doc = element.getDocument();\n\treturn (!doc.compatMode || doc.compatMode == 'CSS1Compat') ? doc.html : doc.body;\n}\n\n})();\n\n//aliases\nElement.alias({position: 'setPosition'}); //compatability\n\n[Window, Document, Element].invoke('implement', {\n\n\tgetHeight: function(){\n\t\treturn this.getSize().y;\n\t},\n\n\tgetWidth: function(){\n\t\treturn this.getSize().x;\n\t},\n\n\tgetScrollTop: function(){\n\t\treturn this.getScroll().y;\n\t},\n\n\tgetScrollLeft: function(){\n\t\treturn this.getScroll().x;\n\t},\n\n\tgetScrollHeight: function(){\n\t\treturn this.getScrollSize().y;\n\t},\n\n\tgetScrollWidth: function(){\n\t\treturn this.getScrollSize().x;\n\t},\n\n\tgetTop: function(){\n\t\treturn this.getPosition().y;\n\t},\n\n\tgetLeft: function(){\n\t\treturn this.getPosition().x;\n\t}\n\n});\n\n\n/*\n---\n\nname: Fx\n\ndescription: Contains the basic animation logic to be extended by all other Fx Classes.\n\nlicense: MIT-style license.\n\nrequires: [Chain, Events, Options]\n\nprovides: Fx\n\n...\n*/\n\n(function(){\n\nvar Fx = this.Fx = new Class({\n\n\tImplements: [Chain, Events, Options],\n\n\toptions: {\n\t\t/*\n\t\tonStart: nil,\n\t\tonCancel: nil,\n\t\tonComplete: nil,\n\t\t*/\n\t\tfps: 60,\n\t\tunit: false,\n\t\tduration: 500,\n\t\tframes: null,\n\t\tframeSkip: true,\n\t\tlink: 'ignore'\n\t},\n\n\tinitialize: function(options){\n\t\tthis.subject = this.subject || this;\n\t\tthis.setOptions(options);\n\t},\n\n\tgetTransition: function(){\n\t\treturn function(p){\n\t\t\treturn -(Math.cos(Math.PI * p) - 1) / 2;\n\t\t};\n\t},\n\n\tstep: function(now){\n\t\tif (this.options.frameSkip){\n\t\t\tvar diff = (this.time != null) ? (now - this.time) : 0, frames = diff / this.frameInterval;\n\t\t\tthis.time = now;\n\t\t\tthis.frame += frames;\n\t\t} else {\n\t\t\tthis.frame++;\n\t\t}\n\n\t\tif (this.frame < this.frames){\n\t\t\tvar delta = this.transition(this.frame / this.frames);\n\t\t\tthis.set(this.compute(this.from, this.to, delta));\n\t\t} else {\n\t\t\tthis.frame = this.frames;\n\t\t\tthis.set(this.compute(this.from, this.to, 1));\n\t\t\tthis.stop();\n\t\t}\n\t},\n\n\tset: function(now){\n\t\treturn now;\n\t},\n\n\tcompute: function(from, to, delta){\n\t\treturn Fx.compute(from, to, delta);\n\t},\n\n\tcheck: function(){\n\t\tif (!this.isRunning()) return true;\n\t\tswitch (this.options.link){\n\t\t\tcase 'cancel': this.cancel(); return true;\n\t\t\tcase 'chain': this.chain(this.caller.pass(arguments, this)); return false;\n\t\t}\n\t\treturn false;\n\t},\n\n\tstart: function(from, to){\n\t\tif (!this.check(from, to)) return this;\n\t\tthis.from = from;\n\t\tthis.to = to;\n\t\tthis.frame = (this.options.frameSkip) ? 0 : -1;\n\t\tthis.time = null;\n\t\tthis.transition = this.getTransition();\n\t\tvar frames = this.options.frames, fps = this.options.fps, duration = this.options.duration;\n\t\tthis.duration = Fx.Durations[duration] || duration.toInt();\n\t\tthis.frameInterval = 1000 / fps;\n\t\tthis.frames = frames || Math.round(this.duration / this.frameInterval);\n\t\tthis.fireEvent('start', this.subject);\n\t\tpushInstance.call(this, fps);\n\t\treturn this;\n\t},\n\n\tstop: function(){\n\t\tif (this.isRunning()){\n\t\t\tthis.time = null;\n\t\t\tpullInstance.call(this, this.options.fps);\n\t\t\tif (this.frames == this.frame){\n\t\t\t\tthis.fireEvent('complete', this.subject);\n\t\t\t\tif (!this.callChain()) this.fireEvent('chainComplete', this.subject);\n\t\t\t} else {\n\t\t\t\tthis.fireEvent('stop', this.subject);\n\t\t\t}\n\t\t}\n\t\treturn this;\n\t},\n\n\tcancel: function(){\n\t\tif (this.isRunning()){\n\t\t\tthis.time = null;\n\t\t\tpullInstance.call(this, this.options.fps);\n\t\t\tthis.frame = this.frames;\n\t\t\tthis.fireEvent('cancel', this.subject).clearChain();\n\t\t}\n\t\treturn this;\n\t},\n\n\tpause: function(){\n\t\tif (this.isRunning()){\n\t\t\tthis.time = null;\n\t\t\tpullInstance.call(this, this.options.fps);\n\t\t}\n\t\treturn this;\n\t},\n\n\tresume: function(){\n\t\tif ((this.frame < this.frames) && !this.isRunning()) pushInstance.call(this, this.options.fps);\n\t\treturn this;\n\t},\n\n\tisRunning: function(){\n\t\tvar list = instances[this.options.fps];\n\t\treturn list && list.contains(this);\n\t}\n\n});\n\nFx.compute = function(from, to, delta){\n\treturn (to - from) * delta + from;\n};\n\nFx.Durations = {'short': 250, 'normal': 500, 'long': 1000};\n\n// global timers\n\nvar instances = {}, timers = {};\n\nvar loop = function(){\n\tvar now = Date.now();\n\tfor (var i = this.length; i--;){\n\t\tvar instance = this[i];\n\t\tif (instance) instance.step(now);\n\t}\n};\n\nvar pushInstance = function(fps){\n\tvar list = instances[fps] || (instances[fps] = []);\n\tlist.push(this);\n\tif (!timers[fps]) timers[fps] = loop.periodical(Math.round(1000 / fps), list);\n};\n\nvar pullInstance = function(fps){\n\tvar list = instances[fps];\n\tif (list){\n\t\tlist.erase(this);\n\t\tif (!list.length && timers[fps]){\n\t\t\tdelete instances[fps];\n\t\t\ttimers[fps] = clearInterval(timers[fps]);\n\t\t}\n\t}\n};\n\n})();\n\n\n/*\n---\n\nname: Fx.CSS\n\ndescription: Contains the CSS animation logic. Used by Fx.Tween, Fx.Morph, Fx.Elements.\n\nlicense: MIT-style license.\n\nrequires: [Fx, Element.Style]\n\nprovides: Fx.CSS\n\n...\n*/\n\nFx.CSS = new Class({\n\n\tExtends: Fx,\n\n\t//prepares the base from/to object\n\n\tprepare: function(element, property, values){\n\t\tvalues = Array.from(values);\n\t\tvar from = values[0], to = values[1];\n\t\tif (to == null){\n\t\t\tto = from;\n\t\t\tfrom = element.getStyle(property);\n\t\t\tvar unit = this.options.unit;\n\t\t\t// adapted from: https://github.com/ryanmorr/fx/blob/master/fx.js#L299\n\t\t\tif (unit && from.slice(-unit.length) != unit && parseFloat(from) != 0){\n\t\t\t\telement.setStyle(property, to + unit);\n\t\t\t\tvar value = element.getComputedStyle(property);\n\t\t\t\t// IE and Opera support pixelLeft or pixelWidth\n\t\t\t\tif (!(/px$/.test(value))){\n\t\t\t\t\tvalue = element.style[('pixel-' + property).camelCase()];\n\t\t\t\t\tif (value == null){\n\t\t\t\t\t\t// adapted from Dean Edwards' http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291\n\t\t\t\t\t\tvar left = element.style.left;\n\t\t\t\t\t\telement.style.left = to + unit;\n\t\t\t\t\t\tvalue = element.style.pixelLeft;\n\t\t\t\t\t\telement.style.left = left;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\tfrom = (to || 1) / (parseFloat(value) || 1) * (parseFloat(from) || 0);\n\t\t\t\telement.setStyle(property, from + unit);\n\t\t\t}\n\t\t}\n\t\treturn {from: this.parse(from), to: this.parse(to)};\n\t},\n\n\t//parses a value into an array\n\n\tparse: function(value){\n\t\tvalue = Function.from(value)();\n\t\tvalue = (typeof value == 'string') ? value.split(' ') : Array.from(value);\n\t\treturn value.map(function(val){\n\t\t\tval = String(val);\n\t\t\tvar found = false;\n\t\t\tObject.each(Fx.CSS.Parsers, function(parser, key){\n\t\t\t\tif (found) return;\n\t\t\t\tvar parsed = parser.parse(val);\n\t\t\t\tif (parsed || parsed === 0) found = {value: parsed, parser: parser};\n\t\t\t});\n\t\t\tfound = found || {value: val, parser: Fx.CSS.Parsers.String};\n\t\t\treturn found;\n\t\t});\n\t},\n\n\t//computes by a from and to prepared objects, using their parsers.\n\n\tcompute: function(from, to, delta){\n\t\tvar computed = [];\n\t\t(Math.min(from.length, to.length)).times(function(i){\n\t\t\tcomputed.push({value: from[i].parser.compute(from[i].value, to[i].value, delta), parser: from[i].parser});\n\t\t});\n\t\tcomputed.$family = Function.from('fx:css:value');\n\t\treturn computed;\n\t},\n\n\t//serves the value as settable\n\n\tserve: function(value, unit){\n\t\tif (typeOf(value) != 'fx:css:value') value = this.parse(value);\n\t\tvar returned = [];\n\t\tvalue.each(function(bit){\n\t\t\treturned = returned.concat(bit.parser.serve(bit.value, unit));\n\t\t});\n\t\treturn returned;\n\t},\n\n\t//renders the change to an element\n\n\trender: function(element, property, value, unit){\n\t\telement.setStyle(property, this.serve(value, unit));\n\t},\n\n\t//searches inside the page css to find the values for a selector\n\n\tsearch: function(selector){\n\t\tif (Fx.CSS.Cache[selector]) return Fx.CSS.Cache[selector];\n\t\tvar to = {}, selectorTest = new RegExp('^' + selector.escapeRegExp() + '$');\n\t\tArray.each(document.styleSheets, function(sheet, j){\n\t\t\tvar href = sheet.href;\n\t\t\tif (href && href.contains('://') && !href.contains(document.domain)) return;\n\t\t\tvar rules = sheet.rules || sheet.cssRules;\n\t\t\tArray.each(rules, function(rule, i){\n\t\t\t\tif (!rule.style) return;\n\t\t\t\tvar selectorText = (rule.selectorText) ? rule.selectorText.replace(/^\\w+/, function(m){\n\t\t\t\t\treturn m.toLowerCase();\n\t\t\t\t}) : null;\n\t\t\t\tif (!selectorText || !selectorTest.test(selectorText)) return;\n\t\t\t\tObject.each(Element.Styles, function(value, style){\n\t\t\t\t\tif (!rule.style[style] || Element.ShortStyles[style]) return;\n\t\t\t\t\tvalue = String(rule.style[style]);\n\t\t\t\t\tto[style] = ((/^rgb/).test(value)) ? value.rgbToHex() : value;\n\t\t\t\t});\n\t\t\t});\n\t\t});\n\t\treturn Fx.CSS.Cache[selector] = to;\n\t}\n\n});\n\nFx.CSS.Cache = {};\n\nFx.CSS.Parsers = {\n\n\tColor: {\n\t\tparse: function(value){\n\t\t\tif (value.match(/^#[0-9a-f]{3,6}$/i)) return value.hexToRgb(true);\n\t\t\treturn ((value = value.match(/(\\d+),\\s*(\\d+),\\s*(\\d+)/))) ? [value[1], value[2], value[3]] : false;\n\t\t},\n\t\tcompute: function(from, to, delta){\n\t\t\treturn from.map(function(value, i){\n\t\t\t\treturn Math.round(Fx.compute(from[i], to[i], delta));\n\t\t\t});\n\t\t},\n\t\tserve: function(value){\n\t\t\treturn value.map(Number);\n\t\t}\n\t},\n\n\tNumber: {\n\t\tparse: parseFloat,\n\t\tcompute: Fx.compute,\n\t\tserve: function(value, unit){\n\t\t\treturn (unit) ? value + unit : value;\n\t\t}\n\t},\n\n\tString: {\n\t\tparse: Function.from(false),\n\t\tcompute: function(zero, one){\n\t\t\treturn one;\n\t\t},\n\t\tserve: function(zero){\n\t\t\treturn zero;\n\t\t}\n\t}\n\n};\n\n\n\n\n/*\n---\n\nname: Fx.Tween\n\ndescription: Formerly Fx.Style, effect to transition any CSS property for an element.\n\nlicense: MIT-style license.\n\nrequires: Fx.CSS\n\nprovides: [Fx.Tween, Element.fade, Element.highlight]\n\n...\n*/\n\nFx.Tween = new Class({\n\n\tExtends: Fx.CSS,\n\n\tinitialize: function(element, options){\n\t\tthis.element = this.subject = document.id(element);\n\t\tthis.parent(options);\n\t},\n\n\tset: function(property, now){\n\t\tif (arguments.length == 1){\n\t\t\tnow = property;\n\t\t\tproperty = this.property || this.options.property;\n\t\t}\n\t\tthis.render(this.element, property, now, this.options.unit);\n\t\treturn this;\n\t},\n\n\tstart: function(property, from, to){\n\t\tif (!this.check(property, from, to)) return this;\n\t\tvar args = Array.flatten(arguments);\n\t\tthis.property = this.options.property || args.shift();\n\t\tvar parsed = this.prepare(this.element, this.property, args);\n\t\treturn this.parent(parsed.from, parsed.to);\n\t}\n\n});\n\nElement.Properties.tween = {\n\n\tset: function(options){\n\t\tthis.get('tween').cancel().setOptions(options);\n\t\treturn this;\n\t},\n\n\tget: function(){\n\t\tvar tween = this.retrieve('tween');\n\t\tif (!tween){\n\t\t\ttween = new Fx.Tween(this, {link: 'cancel'});\n\t\t\tthis.store('tween', tween);\n\t\t}\n\t\treturn tween;\n\t}\n\n};\n\nElement.implement({\n\n\ttween: function(property, from, to){\n\t\tthis.get('tween').start(property, from, to);\n\t\treturn this;\n\t},\n\n\tfade: function(how){\n\t\tvar fade = this.get('tween'), method, args = ['opacity'].append(arguments), toggle;\n\t\tif (args[1] == null) args[1] = 'toggle';\n\t\tswitch (args[1]){\n\t\t\tcase 'in': method = 'start'; args[1] = 1; break;\n\t\t\tcase 'out': method = 'start'; args[1] = 0; break;\n\t\t\tcase 'show': method = 'set'; args[1] = 1; break;\n\t\t\tcase 'hide': method = 'set'; args[1] = 0; break;\n\t\t\tcase 'toggle':\n\t\t\t\tvar flag = this.retrieve('fade:flag', this.getStyle('opacity') == 1);\n\t\t\t\tmethod = 'start';\n\t\t\t\targs[1] = flag ? 0 : 1;\n\t\t\t\tthis.store('fade:flag', !flag);\n\t\t\t\ttoggle = true;\n\t\t\tbreak;\n\t\t\tdefault: method = 'start';\n\t\t}\n\t\tif (!toggle) this.eliminate('fade:flag');\n\t\tfade[method].apply(fade, args);\n\t\tvar to = args[args.length - 1];\n\t\tif (method == 'set' || to != 0) this.setStyle('visibility', to == 0 ? 'hidden' : 'visible');\n\t\telse fade.chain(function(){\n\t\t\tthis.element.setStyle('visibility', 'hidden');\n\t\t\tthis.callChain();\n\t\t});\n\t\treturn this;\n\t},\n\n\thighlight: function(start, end){\n\t\tif (!end){\n\t\t\tend = this.retrieve('highlight:original', this.getStyle('background-color'));\n\t\t\tend = (end == 'transparent') ? '#fff' : end;\n\t\t}\n\t\tvar tween = this.get('tween');\n\t\ttween.start('background-color', start || '#ffff88', end).chain(function(){\n\t\t\tthis.setStyle('background-color', this.retrieve('highlight:original'));\n\t\t\ttween.callChain();\n\t\t}.bind(this));\n\t\treturn this;\n\t}\n\n});\n\n\n/*\n---\n\nname: Fx.Morph\n\ndescription: Formerly Fx.Styles, effect to transition any number of CSS properties for an element using an object of rules, or CSS based selector rules.\n\nlicense: MIT-style license.\n\nrequires: Fx.CSS\n\nprovides: Fx.Morph\n\n...\n*/\n\nFx.Morph = new Class({\n\n\tExtends: Fx.CSS,\n\n\tinitialize: function(element, options){\n\t\tthis.element = this.subject = document.id(element);\n\t\tthis.parent(options);\n\t},\n\n\tset: function(now){\n\t\tif (typeof now == 'string') now = this.search(now);\n\t\tfor (var p in now) this.render(this.element, p, now[p], this.options.unit);\n\t\treturn this;\n\t},\n\n\tcompute: function(from, to, delta){\n\t\tvar now = {};\n\t\tfor (var p in from) now[p] = this.parent(from[p], to[p], delta);\n\t\treturn now;\n\t},\n\n\tstart: function(properties){\n\t\tif (!this.check(properties)) return this;\n\t\tif (typeof properties == 'string') properties = this.search(properties);\n\t\tvar from = {}, to = {};\n\t\tfor (var p in properties){\n\t\t\tvar parsed = this.prepare(this.element, p, properties[p]);\n\t\t\tfrom[p] = parsed.from;\n\t\t\tto[p] = parsed.to;\n\t\t}\n\t\treturn this.parent(from, to);\n\t}\n\n});\n\nElement.Properties.morph = {\n\n\tset: function(options){\n\t\tthis.get('morph').cancel().setOptions(options);\n\t\treturn this;\n\t},\n\n\tget: function(){\n\t\tvar morph = this.retrieve('morph');\n\t\tif (!morph){\n\t\t\tmorph = new Fx.Morph(this, {link: 'cancel'});\n\t\t\tthis.store('morph', morph);\n\t\t}\n\t\treturn morph;\n\t}\n\n};\n\nElement.implement({\n\n\tmorph: function(props){\n\t\tthis.get('morph').start(props);\n\t\treturn this;\n\t}\n\n});\n\n\n/*\n---\n\nname: Fx.Transitions\n\ndescription: Contains a set of advanced transitions to be used with any of the Fx Classes.\n\nlicense: MIT-style license.\n\ncredits:\n - Easing Equations by Robert Penner, , modified and optimized to be used with MooTools.\n\nrequires: Fx\n\nprovides: Fx.Transitions\n\n...\n*/\n\nFx.implement({\n\n\tgetTransition: function(){\n\t\tvar trans = this.options.transition || Fx.Transitions.Sine.easeInOut;\n\t\tif (typeof trans == 'string'){\n\t\t\tvar data = trans.split(':');\n\t\t\ttrans = Fx.Transitions;\n\t\t\ttrans = trans[data[0]] || trans[data[0].capitalize()];\n\t\t\tif (data[1]) trans = trans['ease' + data[1].capitalize() + (data[2] ? data[2].capitalize() : '')];\n\t\t}\n\t\treturn trans;\n\t}\n\n});\n\nFx.Transition = function(transition, params){\n\tparams = Array.from(params);\n\tvar easeIn = function(pos){\n\t\treturn transition(pos, params);\n\t};\n\treturn Object.append(easeIn, {\n\t\teaseIn: easeIn,\n\t\teaseOut: function(pos){\n\t\t\treturn 1 - transition(1 - pos, params);\n\t\t},\n\t\teaseInOut: function(pos){\n\t\t\treturn (pos <= 0.5 ? transition(2 * pos, params) : (2 - transition(2 * (1 - pos), params))) / 2;\n\t\t}\n\t});\n};\n\nFx.Transitions = {\n\n\tlinear: function(zero){\n\t\treturn zero;\n\t}\n\n};\n\n\n\nFx.Transitions.extend = function(transitions){\n\tfor (var transition in transitions) Fx.Transitions[transition] = new Fx.Transition(transitions[transition]);\n};\n\nFx.Transitions.extend({\n\n\tPow: function(p, x){\n\t\treturn Math.pow(p, x && x[0] || 6);\n\t},\n\n\tExpo: function(p){\n\t\treturn Math.pow(2, 8 * (p - 1));\n\t},\n\n\tCirc: function(p){\n\t\treturn 1 - Math.sin(Math.acos(p));\n\t},\n\n\tSine: function(p){\n\t\treturn 1 - Math.cos(p * Math.PI / 2);\n\t},\n\n\tBack: function(p, x){\n\t\tx = x && x[0] || 1.618;\n\t\treturn Math.pow(p, 2) * ((x + 1) * p - x);\n\t},\n\n\tBounce: function(p){\n\t\tvar value;\n\t\tfor (var a = 0, b = 1; 1; a += b, b /= 2){\n\t\t\tif (p >= (7 - 4 * a) / 11){\n\t\t\t\tvalue = b * b - Math.pow((11 - 6 * a - 11 * p) / 4, 2);\n\t\t\t\tbreak;\n\t\t\t}\n\t\t}\n\t\treturn value;\n\t},\n\n\tElastic: function(p, x){\n\t\treturn Math.pow(2, 10 * --p) * Math.cos(20 * p * Math.PI * (x && x[0] || 1) / 3);\n\t}\n\n});\n\n['Quad', 'Cubic', 'Quart', 'Quint'].each(function(transition, i){\n\tFx.Transitions[transition] = new Fx.Transition(function(p){\n\t\treturn Math.pow(p, i + 2);\n\t});\n});\n\n\n/*\n---\n\nname: Request\n\ndescription: Powerful all purpose Request Class. Uses XMLHTTPRequest.\n\nlicense: MIT-style license.\n\nrequires: [Object, Element, Chain, Events, Options, Browser]\n\nprovides: Request\n\n...\n*/\n\n(function(){\n\nvar empty = function(){},\n\tprogressSupport = ('onprogress' in new Browser.Request);\n\nvar Request = this.Request = new Class({\n\n\tImplements: [Chain, Events, Options],\n\n\toptions: {/*\n\t\tonRequest: function(){},\n\t\tonLoadstart: function(event, xhr){},\n\t\tonProgress: function(event, xhr){},\n\t\tonComplete: function(){},\n\t\tonCancel: function(){},\n\t\tonSuccess: function(responseText, responseXML){},\n\t\tonFailure: function(xhr){},\n\t\tonException: function(headerName, value){},\n\t\tonTimeout: function(){},\n\t\tuser: '',\n\t\tpassword: '',*/\n\t\turl: '',\n\t\tdata: '',\n\t\theaders: {\n\t\t\t'X-Requested-With': 'XMLHttpRequest',\n\t\t\t'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'\n\t\t},\n\t\tasync: true,\n\t\tformat: false,\n\t\tmethod: 'post',\n\t\tlink: 'ignore',\n\t\tisSuccess: null,\n\t\temulation: true,\n\t\turlEncoded: true,\n\t\tencoding: 'utf-8',\n\t\tevalScripts: false,\n\t\tevalResponse: false,\n\t\ttimeout: 0,\n\t\tnoCache: false\n\t},\n\n\tinitialize: function(options){\n\t\tthis.xhr = new Browser.Request();\n\t\tthis.setOptions(options);\n\t\tthis.headers = this.options.headers;\n\t},\n\n\tonStateChange: function(){\n\t\tvar xhr = this.xhr;\n\t\tif (xhr.readyState != 4 || !this.running) return;\n\t\tthis.running = false;\n\t\tthis.status = 0;\n\t\tFunction.attempt(function(){\n\t\t\tvar status = xhr.status;\n\t\t\tthis.status = (status == 1223) ? 204 : status;\n\t\t}.bind(this));\n\t\txhr.onreadystatechange = empty;\n\t\tif (progressSupport) xhr.onprogress = xhr.onloadstart = empty;\n\t\tclearTimeout(this.timer);\n\n\t\tthis.response = {text: this.xhr.responseText || '', xml: this.xhr.responseXML};\n\t\tif (this.options.isSuccess.call(this, this.status))\n\t\t\tthis.success(this.response.text, this.response.xml);\n\t\telse\n\t\t\tthis.failure();\n\t},\n\n\tisSuccess: function(){\n\t\tvar status = this.status;\n\t\treturn (status >= 200 && status < 300);\n\t},\n\n\tisRunning: function(){\n\t\treturn !!this.running;\n\t},\n\n\tprocessScripts: function(text){\n\t\tif (this.options.evalResponse || (/(ecma|java)script/).test(this.getHeader('Content-type'))) return Browser.exec(text);\n\t\treturn text.stripScripts(this.options.evalScripts);\n\t},\n\n\tsuccess: function(text, xml){\n\t\tthis.onSuccess(this.processScripts(text), xml);\n\t},\n\n\tonSuccess: function(){\n\t\tthis.fireEvent('complete', arguments).fireEvent('success', arguments).callChain();\n\t},\n\n\tfailure: function(){\n\t\tthis.onFailure();\n\t},\n\n\tonFailure: function(){\n\t\tthis.fireEvent('complete').fireEvent('failure', this.xhr);\n\t},\n\n\tloadstart: function(event){\n\t\tthis.fireEvent('loadstart', [event, this.xhr]);\n\t},\n\n\tprogress: function(event){\n\t\tthis.fireEvent('progress', [event, this.xhr]);\n\t},\n\n\ttimeout: function(){\n\t\tthis.fireEvent('timeout', this.xhr);\n\t},\n\n\tsetHeader: function(name, value){\n\t\tthis.headers[name] = value;\n\t\treturn this;\n\t},\n\n\tgetHeader: function(name){\n\t\treturn Function.attempt(function(){\n\t\t\treturn this.xhr.getResponseHeader(name);\n\t\t}.bind(this));\n\t},\n\n\tcheck: function(){\n\t\tif (!this.running) return true;\n\t\tswitch (this.options.link){\n\t\t\tcase 'cancel': this.cancel(); return true;\n\t\t\tcase 'chain': this.chain(this.caller.pass(arguments, this)); return false;\n\t\t}\n\t\treturn false;\n\t},\n\n\tsend: function(options){\n\t\tif (!this.check(options)) return this;\n\n\t\tthis.options.isSuccess = this.options.isSuccess || this.isSuccess;\n\t\tthis.running = true;\n\n\t\tvar type = typeOf(options);\n\t\tif (type == 'string' || type == 'element') options = {data: options};\n\n\t\tvar old = this.options;\n\t\toptions = Object.append({data: old.data, url: old.url, method: old.method}, options);\n\t\tvar data = options.data, url = String(options.url), method = options.method.toLowerCase();\n\n\t\tswitch (typeOf(data)){\n\t\t\tcase 'element': data = document.id(data).toQueryString(); break;\n\t\t\tcase 'object': case 'hash': data = Object.toQueryString(data);\n\t\t}\n\n\t\tif (this.options.format){\n\t\t\tvar format = 'format=' + this.options.format;\n\t\t\tdata = (data) ? format + '&' + data : format;\n\t\t}\n\n\t\tif (this.options.emulation && !['get', 'post'].contains(method)){\n\t\t\tvar _method = '_method=' + method;\n\t\t\tdata = (data) ? _method + '&' + data : _method;\n\t\t\tmethod = 'post';\n\t\t}\n\n\t\tif (this.options.urlEncoded && ['post', 'put'].contains(method)){\n\t\t\tvar encoding = (this.options.encoding) ? '; charset=' + this.options.encoding : '';\n\t\t\tthis.headers['Content-type'] = 'application/x-www-form-urlencoded' + encoding;\n\t\t}\n\n\t\tif (!url) url = document.location.pathname;\n\n\t\tvar trimPosition = url.lastIndexOf('/');\n\t\tif (trimPosition > -1 && (trimPosition = url.indexOf('#')) > -1) url = url.substr(0, trimPosition);\n\n\t\tif (this.options.noCache)\n\t\t\turl += (url.contains('?') ? '&' : '?') + String.uniqueID();\n\n\t\tif (data && method == 'get'){\n\t\t\turl += (url.contains('?') ? '&' : '?') + data;\n\t\t\tdata = null;\n\t\t}\n\n\t\tvar xhr = this.xhr;\n\t\tif (progressSupport){\n\t\t\txhr.onloadstart = this.loadstart.bind(this);\n\t\t\txhr.onprogress = this.progress.bind(this);\n\t\t}\n\n\t\txhr.open(method.toUpperCase(), url, this.options.async, this.options.user, this.options.password);\n\t\tif (this.options.user && 'withCredentials' in xhr) xhr.withCredentials = true;\n\n\t\txhr.onreadystatechange = this.onStateChange.bind(this);\n\n\t\tObject.each(this.headers, function(value, key){\n\t\t\ttry {\n\t\t\t\txhr.setRequestHeader(key, value);\n\t\t\t} catch (e){\n\t\t\t\tthis.fireEvent('exception', [key, value]);\n\t\t\t}\n\t\t}, this);\n\n\t\tthis.fireEvent('request');\n\t\txhr.send(data);\n\t\tif (!this.options.async) this.onStateChange();\n\t\telse if (this.options.timeout) this.timer = this.timeout.delay(this.options.timeout, this);\n\t\treturn this;\n\t},\n\n\tcancel: function(){\n\t\tif (!this.running) return this;\n\t\tthis.running = false;\n\t\tvar xhr = this.xhr;\n\t\txhr.abort();\n\t\tclearTimeout(this.timer);\n\t\txhr.onreadystatechange = empty;\n\t\tif (progressSupport) xhr.onprogress = xhr.onloadstart = empty;\n\t\tthis.xhr = new Browser.Request();\n\t\tthis.fireEvent('cancel');\n\t\treturn this;\n\t}\n\n});\n\nvar methods = {};\n['get', 'post', 'put', 'delete', 'GET', 'POST', 'PUT', 'DELETE'].each(function(method){\n\tmethods[method] = function(data){\n\t\tvar object = {\n\t\t\tmethod: method\n\t\t};\n\t\tif (data != null) object.data = data;\n\t\treturn this.send(object);\n\t};\n});\n\nRequest.implement(methods);\n\nElement.Properties.send = {\n\n\tset: function(options){\n\t\tvar send = this.get('send').cancel();\n\t\tsend.setOptions(options);\n\t\treturn this;\n\t},\n\n\tget: function(){\n\t\tvar send = this.retrieve('send');\n\t\tif (!send){\n\t\t\tsend = new Request({\n\t\t\t\tdata: this, link: 'cancel', method: this.get('method') || 'post', url: this.get('action')\n\t\t\t});\n\t\t\tthis.store('send', send);\n\t\t}\n\t\treturn send;\n\t}\n\n};\n\nElement.implement({\n\n\tsend: function(url){\n\t\tvar sender = this.get('send');\n\t\tsender.send({data: this, url: url || sender.options.url});\n\t\treturn this;\n\t}\n\n});\n\n})();\n\n\n/*\n---\n\nname: Request.HTML\n\ndescription: Extends the basic Request Class with additional methods for interacting with HTML responses.\n\nlicense: MIT-style license.\n\nrequires: [Element, Request]\n\nprovides: Request.HTML\n\n...\n*/\n\nRequest.HTML = new Class({\n\n\tExtends: Request,\n\n\toptions: {\n\t\tupdate: false,\n\t\tappend: false,\n\t\tevalScripts: true,\n\t\tfilter: false,\n\t\theaders: {\n\t\t\tAccept: 'text/html, application/xml, text/xml, */*'\n\t\t}\n\t},\n\n\tsuccess: function(text){\n\t\tvar options = this.options, response = this.response;\n\n\t\tresponse.html = text.stripScripts(function(script){\n\t\t\tresponse.javascript = script;\n\t\t});\n\n\t\tvar match = response.html.match(/]*>([\\s\\S]*?)<\\/body>/i);\n\t\tif (match) response.html = match[1];\n\t\tvar temp = new Element('div').set('html', response.html);\n\n\t\tresponse.tree = temp.childNodes;\n\t\tresponse.elements = temp.getElements(options.filter || '*');\n\n\t\tif (options.filter) response.tree = response.elements;\n\t\tif (options.update){\n\t\t\tvar update = document.id(options.update).empty();\n\t\t\tif (options.filter) update.adopt(response.elements);\n\t\t\telse update.set('html', response.html);\n\t\t} else if (options.append){\n\t\t\tvar append = document.id(options.append);\n\t\t\tif (options.filter) response.elements.reverse().inject(append);\n\t\t\telse append.adopt(temp.getChildren());\n\t\t}\n\t\tif (options.evalScripts) Browser.exec(response.javascript);\n\n\t\tthis.onSuccess(response.tree, response.elements, response.html, response.javascript);\n\t}\n\n});\n\nElement.Properties.load = {\n\n\tset: function(options){\n\t\tvar load = this.get('load').cancel();\n\t\tload.setOptions(options);\n\t\treturn this;\n\t},\n\n\tget: function(){\n\t\tvar load = this.retrieve('load');\n\t\tif (!load){\n\t\t\tload = new Request.HTML({data: this, link: 'cancel', update: this, method: 'get'});\n\t\t\tthis.store('load', load);\n\t\t}\n\t\treturn load;\n\t}\n\n};\n\nElement.implement({\n\n\tload: function(){\n\t\tthis.get('load').send(Array.link(arguments, {data: Type.isObject, url: Type.isString}));\n\t\treturn this;\n\t}\n\n});\n\n\n/*\n---\n\nname: JSON\n\ndescription: JSON encoder and decoder.\n\nlicense: MIT-style license.\n\nSeeAlso: \n\nrequires: [Array, String, Number, Function]\n\nprovides: JSON\n\n...\n*/\n\nif (typeof JSON == 'undefined') this.JSON = {};\n\n\n\n(function(){\n\nvar special = {'\\b': '\\\\b', '\\t': '\\\\t', '\\n': '\\\\n', '\\f': '\\\\f', '\\r': '\\\\r', '\"' : '\\\\\"', '\\\\': '\\\\\\\\'};\n\nvar escape = function(chr){\n\treturn special[chr] || '\\\\u' + ('0000' + chr.charCodeAt(0).toString(16)).slice(-4);\n};\n\nJSON.validate = function(string){\n\tstring = string.replace(/\\\\(?:[\"\\\\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@').\n\t\t\t\t\treplace(/\"[^\"\\\\\\n\\r]*\"|true|false|null|-?\\d+(?:\\.\\d*)?(?:[eE][+\\-]?\\d+)?/g, ']').\n\t\t\t\t\treplace(/(?:^|:|,)(?:\\s*\\[)+/g, '');\n\n\treturn (/^[\\],:{}\\s]*$/).test(string);\n};\n\nJSON.encode = JSON.stringify ? function(obj){\n\treturn JSON.stringify(obj);\n} : function(obj){\n\tif (obj && obj.toJSON) obj = obj.toJSON();\n\n\tswitch (typeOf(obj)){\n\t\tcase 'string':\n\t\t\treturn '\"' + obj.replace(/[\\x00-\\x1f\\\\\"]/g, escape) + '\"';\n\t\tcase 'array':\n\t\t\treturn '[' + obj.map(JSON.encode).clean() + ']';\n\t\tcase 'object': case 'hash':\n\t\t\tvar string = [];\n\t\t\tObject.each(obj, function(value, key){\n\t\t\t\tvar json = JSON.encode(value);\n\t\t\t\tif (json) string.push(JSON.encode(key) + ':' + json);\n\t\t\t});\n\t\t\treturn '{' + string + '}';\n\t\tcase 'number': case 'boolean': return '' + obj;\n\t\tcase 'null': return 'null';\n\t}\n\n\treturn null;\n};\n\nJSON.decode = function(string, secure){\n\tif (!string || typeOf(string) != 'string') return null;\n\n\tif (secure || JSON.secure){\n\t\tif (JSON.parse) return JSON.parse(string);\n\t\tif (!JSON.validate(string)) throw new Error('JSON could not decode the input; security is enabled and the value is not secure.');\n\t}\n\n\treturn eval('(' + string + ')');\n};\n\n})();\n\n\n/*\n---\n\nname: Request.JSON\n\ndescription: Extends the basic Request Class with additional methods for sending and receiving JSON data.\n\nlicense: MIT-style license.\n\nrequires: [Request, JSON]\n\nprovides: Request.JSON\n\n...\n*/\n\nRequest.JSON = new Class({\n\n\tExtends: Request,\n\n\toptions: {\n\t\t/*onError: function(text, error){},*/\n\t\tsecure: true\n\t},\n\n\tinitialize: function(options){\n\t\tthis.parent(options);\n\t\tObject.append(this.headers, {\n\t\t\t'Accept': 'application/json',\n\t\t\t'X-Request': 'JSON'\n\t\t});\n\t},\n\n\tsuccess: function(text){\n\t\tvar json;\n\t\ttry {\n\t\t\tjson = this.response.json = JSON.decode(text, this.options.secure);\n\t\t} catch (error){\n\t\t\tthis.fireEvent('error', [text, error]);\n\t\t\treturn;\n\t\t}\n\t\tif (json == null) this.onFailure();\n\t\telse this.onSuccess(json, text);\n\t}\n\n});\n\n\n/*\n---\n\nname: Cookie\n\ndescription: Class for creating, reading, and deleting browser Cookies.\n\nlicense: MIT-style license.\n\ncredits:\n - Based on the functions by Peter-Paul Koch (http://quirksmode.org).\n\nrequires: [Options, Browser]\n\nprovides: Cookie\n\n...\n*/\n\nvar Cookie = new Class({\n\n\tImplements: Options,\n\n\toptions: {\n\t\tpath: '/',\n\t\tdomain: false,\n\t\tduration: false,\n\t\tsecure: false,\n\t\tdocument: document,\n\t\tencode: true\n\t},\n\n\tinitialize: function(key, options){\n\t\tthis.key = key;\n\t\tthis.setOptions(options);\n\t},\n\n\twrite: function(value){\n\t\tif (this.options.encode) value = encodeURIComponent(value);\n\t\tif (this.options.domain) value += '; domain=' + this.options.domain;\n\t\tif (this.options.path) value += '; path=' + this.options.path;\n\t\tif (this.options.duration){\n\t\t\tvar date = new Date();\n\t\t\tdate.setTime(date.getTime() + this.options.duration * 24 * 60 * 60 * 1000);\n\t\t\tvalue += '; expires=' + date.toGMTString();\n\t\t}\n\t\tif (this.options.secure) value += '; secure';\n\t\tthis.options.document.cookie = this.key + '=' + value;\n\t\treturn this;\n\t},\n\n\tread: function(){\n\t\tvar value = this.options.document.cookie.match('(?:^|;)\\\\s*' + this.key.escapeRegExp() + '=([^;]*)');\n\t\treturn (value) ? decodeURIComponent(value[1]) : null;\n\t},\n\n\tdispose: function(){\n\t\tnew Cookie(this.key, Object.merge({}, this.options, {duration: -1})).write('');\n\t\treturn this;\n\t}\n\n});\n\nCookie.write = function(key, value, options){\n\treturn new Cookie(key, options).write(value);\n};\n\nCookie.read = function(key){\n\treturn new Cookie(key).read();\n};\n\nCookie.dispose = function(key, options){\n\treturn new Cookie(key, options).dispose();\n};\n\n\n/*\n---\n\nname: DOMReady\n\ndescription: Contains the custom event domready.\n\nlicense: MIT-style license.\n\nrequires: [Browser, Element, Element.Event]\n\nprovides: [DOMReady, DomReady]\n\n...\n*/\n\n(function(window, document){\n\nvar ready,\n\tloaded,\n\tchecks = [],\n\tshouldPoll,\n\ttimer,\n\ttestElement = document.createElement('div');\n\nvar domready = function(){\n\tclearTimeout(timer);\n\tif (ready) return;\n\tBrowser.loaded = ready = true;\n\tdocument.removeListener('DOMContentLoaded', domready).removeListener('readystatechange', check);\n\n\tdocument.fireEvent('domready');\n\twindow.fireEvent('domready');\n};\n\nvar check = function(){\n\tfor (var i = checks.length; i--;) if (checks[i]()){\n\t\tdomready();\n\t\treturn true;\n\t}\n\treturn false;\n};\n\nvar poll = function(){\n\tclearTimeout(timer);\n\tif (!check()) timer = setTimeout(poll, 10);\n};\n\ndocument.addListener('DOMContentLoaded', domready);\n\n/**/\n// doScroll technique by Diego Perini http://javascript.nwbox.com/IEContentLoaded/\n// testElement.doScroll() throws when the DOM is not ready, only in the top window\nvar doScrollWorks = function(){\n\ttry {\n\t\ttestElement.doScroll();\n\t\treturn true;\n\t} catch (e){}\n\treturn false;\n};\n// If doScroll works already, it can't be used to determine domready\n// e.g. in an iframe\nif (testElement.doScroll && !doScrollWorks()){\n\tchecks.push(doScrollWorks);\n\tshouldPoll = true;\n}\n/**/\n\nif (document.readyState) checks.push(function(){\n\tvar state = document.readyState;\n\treturn (state == 'loaded' || state == 'complete');\n});\n\nif ('onreadystatechange' in document) document.addListener('readystatechange', check);\nelse shouldPoll = true;\n\nif (shouldPoll) poll();\n\nElement.Events.domready = {\n\tonAdd: function(fn){\n\t\tif (ready) fn.call(this);\n\t}\n};\n\n// Make sure that domready fires before load\nElement.Events.load = {\n\tbase: 'load',\n\tonAdd: function(fn){\n\t\tif (loaded && this == window) fn.call(this);\n\t},\n\tcondition: function(){\n\t\tif (this == window){\n\t\t\tdomready();\n\t\t\tdelete Element.Events.load;\n\t\t}\n\t\treturn true;\n\t}\n};\n\n// This is based on the custom load event\nwindow.addEvent('load', function(){\n\tloaded = true;\n});\n\n})(window, document);\n\n\n/*\n---\n\nname: Swiff\n\ndescription: Wrapper for embedding SWF movies. Supports External Interface Communication.\n\nlicense: MIT-style license.\n\ncredits:\n - Flash detection & Internet Explorer + Flash Player 9 fix inspired by SWFObject.\n\nrequires: [Options, Object, Element]\n\nprovides: Swiff\n\n...\n*/\n\n(function(){\n\nvar Swiff = this.Swiff = new Class({\n\n\tImplements: Options,\n\n\toptions: {\n\t\tid: null,\n\t\theight: 1,\n\t\twidth: 1,\n\t\tcontainer: null,\n\t\tproperties: {},\n\t\tparams: {\n\t\t\tquality: 'high',\n\t\t\tallowScriptAccess: 'always',\n\t\t\twMode: 'window',\n\t\t\tswLiveConnect: true\n\t\t},\n\t\tcallBacks: {},\n\t\tvars: {}\n\t},\n\n\ttoElement: function(){\n\t\treturn this.object;\n\t},\n\n\tinitialize: function(path, options){\n\t\tthis.instance = 'Swiff_' + String.uniqueID();\n\n\t\tthis.setOptions(options);\n\t\toptions = this.options;\n\t\tvar id = this.id = options.id || this.instance;\n\t\tvar container = document.id(options.container);\n\n\t\tSwiff.CallBacks[this.instance] = {};\n\n\t\tvar params = options.params, vars = options.vars, callBacks = options.callBacks;\n\t\tvar properties = Object.append({height: options.height, width: options.width}, options.properties);\n\n\t\tvar self = this;\n\n\t\tfor (var callBack in callBacks){\n\t\t\tSwiff.CallBacks[this.instance][callBack] = (function(option){\n\t\t\t\treturn function(){\n\t\t\t\t\treturn option.apply(self.object, arguments);\n\t\t\t\t};\n\t\t\t})(callBacks[callBack]);\n\t\t\tvars[callBack] = 'Swiff.CallBacks.' + this.instance + '.' + callBack;\n\t\t}\n\n\t\tparams.flashVars = Object.toQueryString(vars);\n\t\tif (Browser.ie){\n\t\t\tproperties.classid = 'clsid:D27CDB6E-AE6D-11cf-96B8-444553540000';\n\t\t\tparams.movie = path;\n\t\t} else {\n\t\t\tproperties.type = 'application/x-shockwave-flash';\n\t\t}\n\t\tproperties.data = path;\n\n\t\tvar build = '';\n\t\t}\n\t\tbuild += '';\n\t\tthis.object = ((container) ? container.empty() : new Element('div')).set('html', build).firstChild;\n\t},\n\n\treplaces: function(element){\n\t\telement = document.id(element, true);\n\t\telement.parentNode.replaceChild(this.toElement(), element);\n\t\treturn this;\n\t},\n\n\tinject: function(element){\n\t\tdocument.id(element, true).appendChild(this.toElement());\n\t\treturn this;\n\t},\n\n\tremote: function(){\n\t\treturn Swiff.remote.apply(Swiff, [this.toElement()].append(arguments));\n\t}\n\n});\n\nSwiff.CallBacks = {};\n\nSwiff.remote = function(obj, fn){\n\tvar rs = obj.CallFunction('' + __flash__argumentsToXML(arguments, 2) + '');\n\treturn eval(rs);\n};\n\n})();\n\n","var Barometer = new Class({\r\n\tImplements: [Options],\r\n\r\n\toptions: {\r\n\t\tareaSelector: 'map area',\r\n\t\thoverSelector: 'ul li',\r\n\t\tpopupSelector: 'table',\r\n\t\toverlaySelector: '.overlay',\r\n\t\thoverClass: 'hover',\r\n\t\tpopupClass: 'shown',\r\n\t\tga_tracker: null,\r\n\t\tga_category: 'Barometer',\r\n\t\tga_actions: {\r\n\t\t\tshow: 'Gegevens bekijken',\r\n\t\t\tclick: 'Barometer bekijken'\r\n\t\t},\r\n\t\tga_actions_delay: {}\r\n\t},\r\n\r\n\ttrackEventTimer: {},\r\n\r\n\tinitialize: function (element, options) {\r\n\t\tthis.element = document.id(element);\r\n\t\tthis.setOptions(options);\r\n\r\n\t\tthis.hovers = this.element.getElements(this.options.hoverSelector);\r\n\t\tthis.popups = this.element.getElements(this.options.popupSelector);\r\n\t\tthis.overlay = this.element.getElement(this.options.overlaySelector);\r\n\r\n\t\tthis.setup();\r\n\t},\r\n\r\n\tsetup: function () {\r\n\t\tthis.element.addEvent('mouseenter:relay(' + this.options.areaSelector + ')', this.show.bind(this));\r\n\t\tthis.element.addEvent('mouseleave:relay(' + this.options.areaSelector + ')', this.hide.bind(this));\r\n\r\n\t\tif (this.overlay && this.overlay.getElement('a')) {\r\n\t\t\tthis.element.addClass('has-overlay').addEvents({\r\n\t\t\t\t'mouseenter': function () {\r\n\t\t\t\t\tthis.overlay.addClass('shown');\r\n\t\t\t\t} .bind(this),\r\n\t\t\t\t'mouseleave': function () {\r\n\t\t\t\t\tthis.overlay.removeClass('shown');\r\n\t\t\t\t} .bind(this),\r\n\t\t\t\t'click': function () {\r\n\t\t\t\t\tthis.trackEvent('click');\r\n\t\t\t\t\twindow.document.location = this.overlay.getElement('a').href;\r\n\t\t\t\t} .bind(this)\r\n\t\t\t});\r\n\t\t}\r\n\t},\r\n\r\n\tshow: function (e) {\r\n\t\tvar area = document.id(e.target);\r\n\t\tvar className = area.get('class');\r\n\r\n\t\t// Show hovers\r\n\t\tthis.getHovers(className).addClass(this.options.hoverClass);\r\n\r\n\t\t// Show popups\r\n\t\tthis.getPopups(className).addClass(this.options.popupClass);\r\n\r\n\t\t// Track event\r\n\t\tthis.trackEvent('show', area.get('alt'));\r\n\t},\r\n\r\n\thide: function (e) {\r\n\t\tvar area = document.id(e.target);\r\n\t\tvar className = area.get('class');\r\n\r\n\t\t// Hide hovers\r\n\t\tthis.getHovers(className).removeClass(this.options.hoverClass);\r\n\r\n\t\t// Hide popups\r\n\t\tthis.getPopups(className).removeClass(this.options.popupClass);\r\n\r\n\t\t// Clear event tracker timeout\r\n\t\tthis.clearTrackEvent('show');\r\n\t},\r\n\r\n\tgetHovers: function (className) {\r\n\t\treturn this.hovers.filter(function (hover) {\r\n\t\t\treturn hover.hasClass(className);\r\n\t\t});\r\n\t},\r\n\r\n\tgetPopups: function (className) {\r\n\t\treturn this.popups.filter(function (popup) {\r\n\t\t\treturn popup.hasClass(className);\r\n\t\t});\r\n\t},\r\n\r\n\ttrackEvent: function (action, opt_label, opt_value) {\r\n\t\tif (this.options.ga_tracker) {\r\n\t\t\tthis.clearTrackEvent(action);\r\n\t\t\tthis.trackEventTimer[action] = this.options.ga_tracker._trackEvent.delay(this.options.ga_actions_delay[action] || 0, this.options.ga_tracker, [this.options.ga_category, this.options.ga_actions[action], opt_label, opt_value]);\r\n\t\t}\r\n\t},\r\n\r\n\tclearTrackEvent: function (action) {\r\n\t\tclearTimeout(this.trackEventTimer[action]);\r\n\t}\r\n});",null,null,null,null,"const proto = window.Element.prototype;\nconst nativeMatches = proto.matches ||\n proto.matchesSelector ||\n proto.webkitMatchesSelector ||\n proto.mozMatchesSelector ||\n proto.msMatchesSelector ||\n proto.oMatchesSelector;\n\n\n/**\n * Tests if a DOM elements matches any of the test DOM elements or selectors.\n * @param {Element} element The DOM element to test.\n * @param {Element|string|Array} test A DOM element, a CSS\n * selector, or an array of DOM elements or CSS selectors to match against.\n * @return {boolean} True of any part of the test matches.\n */\nexport default function matches(element, test) {\n // Validate input.\n if (element && element.nodeType == 1 && test) {\n // if test is a string or DOM element test it.\n if (typeof test == 'string' || test.nodeType == 1) {\n return element == test ||\n matchesSelector(element, /** @type {string} */ (test));\n } else if ('length' in test) {\n // if it has a length property iterate over the items\n // and return true if any match.\n for (let i = 0, item; item = test[i]; i++) {\n if (element == item || matchesSelector(element, item)) return true;\n }\n }\n }\n // Still here? Return false\n return false;\n}\n\n\n/**\n * Tests whether a DOM element matches a selector. This polyfills the native\n * Element.prototype.matches method across browsers.\n * @param {!Element} element The DOM element to test.\n * @param {string} selector The CSS selector to test element against.\n * @return {boolean} True if the selector matches.\n */\nfunction matchesSelector(element, selector) {\n if (typeof selector != 'string') return false;\n if (nativeMatches) return nativeMatches.call(element, selector);\n const nodes = element.parentNode.querySelectorAll(selector);\n for (let i = 0, node; node = nodes[i]; i++) {\n if (node == element) return true;\n }\n return false;\n}\n","/**\n * Returns an array of a DOM element's parent elements.\n * @param {!Element} element The DOM element whose parents to get.\n * @return {!Array} An array of all parent elemets, or an empty array if no\n * parent elements are found.\n */\nexport default function parents(element) {\n const list = [];\n while (element && element.parentNode && element.parentNode.nodeType == 1) {\n element = /** @type {!Element} */ (element.parentNode);\n list.push(element);\n }\n return list;\n}\n","import closest from './closest';\nimport matches from './matches';\n\n/**\n * Delegates the handling of events for an element matching a selector to an\n * ancestor of the matching element.\n * @param {!Node} ancestor The ancestor element to add the listener to.\n * @param {string} eventType The event type to listen to.\n * @param {string} selector A CSS selector to match against child elements.\n * @param {!Function} callback A function to run any time the event happens.\n * @param {Object=} opts A configuration options object. The available options:\n * - useCapture: If true, bind to the event capture phase.\n * - deep: If true, delegate into shadow trees.\n * @return {Object} The delegate object. It contains a destroy method.\n */\nexport default function delegate(\n ancestor, eventType, selector, callback, opts = {}) {\n // Defines the event listener.\n const listener = function(event) {\n let delegateTarget;\n\n // If opts.composed is true and the event originated from inside a Shadow\n // tree, check the composed path nodes.\n if (opts.composed && typeof event.composedPath == 'function') {\n const composedPath = event.composedPath();\n for (let i = 0, node; node = composedPath[i]; i++) {\n if (node.nodeType == 1 && matches(node, selector)) {\n delegateTarget = node;\n }\n }\n } else {\n // Otherwise check the parents.\n delegateTarget = closest(event.target, selector, true);\n }\n\n if (delegateTarget) {\n callback.call(delegateTarget, event, delegateTarget);\n }\n };\n\n ancestor.addEventListener(eventType, listener, opts.useCapture);\n\n return {\n destroy: function() {\n ancestor.removeEventListener(eventType, listener, opts.useCapture);\n },\n };\n}\n","import matches from './matches';\nimport parents from './parents';\n\n/**\n * Gets the closest parent element that matches the passed selector.\n * @param {Element} element The element whose parents to check.\n * @param {string} selector The CSS selector to match against.\n * @param {boolean=} shouldCheckSelf True if the selector should test against\n * the passed element itself.\n * @return {Element|undefined} The matching element or undefined.\n */\nexport default function closest(element, selector, shouldCheckSelf = false) {\n if (!(element && element.nodeType == 1 && selector)) return;\n const parentElements =\n (shouldCheckSelf ? [element] : []).concat(parents(element));\n\n for (let i = 0, parent; parent = parentElements[i]; i++) {\n if (matches(parent, selector)) return parent;\n }\n}\n","/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\nimport {delegate} from 'dom-utils';\nimport provide from '../provide';\nimport {plugins, trackUsage} from '../usage';\nimport {assign, createFieldsObj, getAttributeFields} from '../utilities';\n\n\n/**\n * Class for the `eventTracker` analytics.js plugin.\n * @implements {EventTrackerPublicInterface}\n */\nclass EventTracker {\n /**\n * Registers declarative event tracking.\n * @param {!Tracker} tracker Passed internally by analytics.js\n * @param {?EventTrackerOpts} opts Passed by the require command.\n */\n constructor(tracker, opts) {\n trackUsage(tracker, plugins.EVENT_TRACKER);\n\n // Feature detects to prevent errors in unsupporting browsers.\n if (!window.addEventListener) return;\n\n /** @type {EventTrackerOpts} */\n const defaultOpts = {\n events: ['click'],\n fieldsObj: {},\n attributePrefix: 'ga-',\n // hitFilter: undefined,\n };\n\n this.opts = /** @type {EventTrackerOpts} */ (assign(defaultOpts, opts));\n\n this.tracker = tracker;\n\n // Binds methods.\n this.handleEvents = this.handleEvents.bind(this);\n\n const selector = '[' + this.opts.attributePrefix + 'on]';\n\n // Creates a mapping of events to their delegates\n this.delegates = {};\n this.opts.events.forEach((event) => {\n this.delegates[event] = delegate(document, event, selector,\n this.handleEvents, {composed: true, useCapture: true});\n });\n }\n\n /**\n * Handles all events on elements with event attributes.\n * @param {Event} event The DOM click event.\n * @param {Element} element The delegated DOM element target.\n */\n handleEvents(event, element) {\n const prefix = this.opts.attributePrefix;\n const events = element.getAttribute(prefix + 'on').split(/\\s*,\\s*/);\n\n // Ensures the type matches one of the events specified on the element.\n if (events.indexOf(event.type) < 0) return;\n\n /** @type {FieldsObj} */\n const defaultFields = {transport: 'beacon'};\n const attributeFields = getAttributeFields(element, prefix);\n const userFields = assign({}, this.opts.fieldsObj, attributeFields);\n const hitType = attributeFields.hitType || 'event';\n\n this.tracker.send(hitType, createFieldsObj(defaultFields,\n userFields, this.tracker, this.opts.hitFilter, element, event));\n }\n\n /**\n * Removes all event listeners and instance properties.\n */\n remove() {\n Object.keys(this.delegates).forEach((key) => {\n this.delegates[key].destroy();\n });\n }\n}\n\n\nprovide('eventTracker', EventTracker);\n","/**\n * Gets all attributes of an element as a plain JavaScriot object.\n * @param {Element} element The element whose attributes to get.\n * @return {!Object} An object whose keys are the attribute keys and whose\n * values are the attribute values. If no attributes exist, an empty\n * object is returned.\n */\nexport default function getAttributes(element) {\n const attrs = {};\n\n // Validate input.\n if (!(element && element.nodeType == 1)) return attrs;\n\n // Return an empty object if there are no attributes.\n const map = element.attributes;\n if (map.length === 0) return {};\n\n for (let i = 0, attr; attr = map[i]; i++) {\n attrs[attr.name] = attr.value;\n }\n return attrs;\n}\n","const HTTP_PORT = '80';\nconst HTTPS_PORT = '443';\nconst DEFAULT_PORT = RegExp(':(' + HTTP_PORT + '|' + HTTPS_PORT + ')$');\n\n\nconst a = document.createElement('a');\nconst cache = {};\n\n\n/**\n * Parses the given url and returns an object mimicing a `Location` object.\n * @param {string} url The url to parse.\n * @return {!Object} An object with the same properties as a `Location`.\n */\nexport default function parseUrl(url) {\n // All falsy values (as well as \".\") should map to the current URL.\n url = (!url || url == '.') ? location.href : url;\n\n if (cache[url]) return cache[url];\n\n a.href = url;\n\n // When parsing file relative paths (e.g. `../index.html`), IE will correctly\n // resolve the `href` property but will keep the `..` in the `path` property.\n // It will also not include the `host` or `hostname` properties. Furthermore,\n // IE will sometimes return no protocol or just a colon, especially for things\n // like relative protocol URLs (e.g. \"//google.com\").\n // To workaround all of these issues, we reparse with the full URL from the\n // `href` property.\n if (url.charAt(0) == '.' || url.charAt(0) == '/') return parseUrl(a.href);\n\n // Don't include default ports.\n let port = (a.port == HTTP_PORT || a.port == HTTPS_PORT) ? '' : a.port;\n\n // PhantomJS sets the port to \"0\" when using the file: protocol.\n port = port == '0' ? '' : port;\n\n // Sometimes IE incorrectly includes a port for default ports\n // (e.g. `:80` or `:443`) even when no port is specified in the URL.\n // http://bit.ly/1rQNoMg\n const host = a.host.replace(DEFAULT_PORT, '');\n\n // Not all browser support `origin` so we have to build it.\n const origin = a.origin ? a.origin : a.protocol + '//' + host;\n\n // Sometimes IE doesn't include the leading slash for pathname.\n // http://bit.ly/1rQNoMg\n const pathname = a.pathname.charAt(0) == '/' ? a.pathname : '/' + a.pathname;\n\n return cache[url] = {\n hash: a.hash,\n host: host,\n hostname: a.hostname,\n href: a.href,\n origin: origin,\n pathname: pathname,\n port: port,\n protocol: a.protocol,\n search: a.search,\n };\n}\n","/**\n * Copyright 2017 Google Inc. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\n/**\n * @fileoverview\n * The functions exported by this module make it easier (and safer) to override\n * foreign object methods (in a modular way) and respond to or modify their\n * invocation. The primary feature is the ability to override a method without\n * worrying if it's already been overridden somewhere else in the codebase. It\n * also allows for safe restoring of an overridden method by only fully\n * restoring a method once all overrides have been removed.\n */\n\n\nconst instances = [];\n\n\n/**\n * A class that wraps a foreign object method and emit events before and\n * after the original method is called.\n */\nexport default class MethodChain {\n /**\n * Adds the passed override method to the list of method chain overrides.\n * @param {!Object} context The object containing the method to chain.\n * @param {string} methodName The name of the method on the object.\n * @param {!Function} methodOverride The override method to add.\n */\n static add(context, methodName, methodOverride) {\n getOrCreateMethodChain(context, methodName).add(methodOverride);\n }\n\n /**\n * Removes a method chain added via `add()`. If the override is the\n * only override added, the original method is restored.\n * @param {!Object} context The object containing the method to unchain.\n * @param {string} methodName The name of the method on the object.\n * @param {!Function} methodOverride The override method to remove.\n */\n static remove(context, methodName, methodOverride) {\n getOrCreateMethodChain(context, methodName).remove(methodOverride);\n }\n\n /**\n * Wraps a foreign object method and overrides it. Also stores a reference\n * to the original method so it can be restored later.\n * @param {!Object} context The object containing the method.\n * @param {string} methodName The name of the method on the object.\n */\n constructor(context, methodName) {\n this.context = context;\n this.methodName = methodName;\n this.isTask = /Task$/.test(methodName);\n\n this.originalMethodReference = this.isTask ?\n context.get(methodName) : context[methodName];\n\n this.methodChain = [];\n this.boundMethodChain = [];\n\n // Wraps the original method.\n this.wrappedMethod = (...args) => {\n const lastBoundMethod =\n this.boundMethodChain[this.boundMethodChain.length - 1];\n\n return lastBoundMethod(...args);\n };\n\n // Override original method with the wrapped one.\n if (this.isTask) {\n context.set(methodName, this.wrappedMethod);\n } else {\n context[methodName] = this.wrappedMethod;\n }\n }\n\n /**\n * Adds a method to the method chain.\n * @param {!Function} overrideMethod The override method to add.\n */\n add(overrideMethod) {\n this.methodChain.push(overrideMethod);\n this.rebindMethodChain();\n }\n\n /**\n * Removes a method from the method chain and restores the prior order.\n * @param {!Function} overrideMethod The override method to remove.\n */\n remove(overrideMethod) {\n const index = this.methodChain.indexOf(overrideMethod);\n if (index > -1) {\n this.methodChain.splice(index, 1);\n if (this.methodChain.length > 0) {\n this.rebindMethodChain();\n } else {\n this.destroy();\n }\n }\n }\n\n /**\n * Loops through the method chain array and recreates the bound method\n * chain array. This is necessary any time a method is added or removed\n * to ensure proper original method context and order.\n */\n rebindMethodChain() {\n this.boundMethodChain = [];\n for (let method, i = 0; method = this.methodChain[i]; i++) {\n const previousMethod = this.boundMethodChain[i - 1] ||\n this.originalMethodReference.bind(this.context);\n this.boundMethodChain.push(method(previousMethod));\n }\n }\n\n /**\n * Calls super and destroys the instance if no registered handlers remain.\n */\n destroy() {\n const index = instances.indexOf(this);\n if (index > -1) {\n instances.splice(index, 1);\n if (this.isTask) {\n this.context.set(this.methodName, this.originalMethodReference);\n } else {\n this.context[this.methodName] = this.originalMethodReference;\n }\n }\n }\n}\n\n\n/**\n * Gets a MethodChain instance for the passed object and method. If the method\n * has already been wrapped via an existing MethodChain instance, that\n * instance is returned.\n * @param {!Object} context The object containing the method.\n * @param {string} methodName The name of the method on the object.\n * @return {!MethodChain}\n */\nfunction getOrCreateMethodChain(context, methodName) {\n let methodChain = instances\n .filter((h) => h.context == context && h.methodName == methodName)[0];\n\n if (!methodChain) {\n methodChain = new MethodChain(context, methodName);\n instances.push(methodChain);\n }\n return methodChain;\n}\n","/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\nimport {getAttributes} from 'dom-utils';\nimport MethodChain from './method-chain';\n\n\n/**\n * Accepts default and user override fields and an optional tracker, hit\n * filter, and target element and returns a single object that can be used in\n * `ga('send', ...)` commands.\n * @param {FieldsObj} defaultFields The default fields to return.\n * @param {FieldsObj} userFields Fields set by the user to override the\n * defaults.\n * @param {Tracker=} tracker The tracker object to apply the hit filter to.\n * @param {Function=} hitFilter A filter function that gets\n * called with the tracker model right before the `buildHitTask`. It can\n * be used to modify the model for the current hit only.\n * @param {Element=} target If the hit originated from an interaction\n * with a DOM element, hitFilter is invoked with that element as the\n * second argument.\n * @param {(Event|TwttrEvent)=} event If the hit originated via a DOM event,\n * hitFilter is invoked with that event as the third argument.\n * @return {!FieldsObj} The final fields object.\n */\nexport function createFieldsObj(\n defaultFields, userFields, tracker = undefined,\n hitFilter = undefined, target = undefined, event = undefined) {\n if (typeof hitFilter == 'function') {\n const originalBuildHitTask = tracker.get('buildHitTask');\n return {\n buildHitTask: (/** @type {!Model} */ model) => {\n model.set(defaultFields, null, true);\n model.set(userFields, null, true);\n hitFilter(model, target, event);\n originalBuildHitTask(model);\n },\n };\n } else {\n return assign({}, defaultFields, userFields);\n }\n}\n\n\n/**\n * Retrieves the attributes from an DOM element and returns a fields object\n * for all attributes matching the passed prefix string.\n * @param {Element} element The DOM element to get attributes from.\n * @param {string} prefix An attribute prefix. Only the attributes matching\n * the prefix will be returned on the fields object.\n * @return {FieldsObj} An object of analytics.js fields and values\n */\nexport function getAttributeFields(element, prefix) {\n const attributes = getAttributes(element);\n const attributeFields = {};\n\n Object.keys(attributes).forEach(function(attribute) {\n // The `on` prefix is used for event handling but isn't a field.\n if (attribute.indexOf(prefix) === 0 && attribute != prefix + 'on') {\n let value = attributes[attribute];\n\n // Detects Boolean value strings.\n if (value == 'true') value = true;\n if (value == 'false') value = false;\n\n const field = camelCase(attribute.slice(prefix.length));\n attributeFields[field] = value;\n }\n });\n\n return attributeFields;\n}\n\n\n/**\n * Accepts a function to be invoked once the DOM is ready. If the DOM is\n * already ready, the callback is invoked immediately.\n * @param {!Function} callback The ready callback.\n */\nexport function domReady(callback) {\n if (document.readyState == 'loading') {\n document.addEventListener('DOMContentLoaded', function fn() {\n document.removeEventListener('DOMContentLoaded', fn);\n callback();\n });\n } else {\n callback();\n }\n}\n\n\n/**\n * Returns a function, that, as long as it continues to be called, will not\n * actually run. The function will only run after it stops being called for\n * `wait` milliseconds.\n * @param {!Function} fn The function to debounce.\n * @param {number} wait The debounce wait timeout in ms.\n * @return {!Function} The debounced function.\n */\nexport function debounce(fn, wait) {\n let timeout;\n return function(...args) {\n clearTimeout(timeout);\n timeout = setTimeout(() => fn(...args), wait);\n };\n}\n\n\n/**\n * Accepts a function and returns a wrapped version of the function that is\n * expected to be called elsewhere in the system. If it's not called\n * elsewhere after the timeout period, it's called regardless. The wrapper\n * function also prevents the callback from being called more than once.\n * @param {!Function} callback The function to call.\n * @param {number=} wait How many milliseconds to wait before invoking\n * the callback.\n * @return {!Function} The wrapped version of the passed function.\n */\nexport function withTimeout(callback, wait = 2000) {\n let called = false;\n const fn = function() {\n if (!called) {\n called = true;\n callback();\n }\n };\n setTimeout(fn, wait);\n return fn;\n}\n\n// Maps trackers to queue by tracking ID.\nconst queueMap = {};\n\n/**\n * Queues a function for execution in the next call stack, or immediately\n * before any send commands are executed on the tracker. This allows\n * autotrack plugins to defer running commands until after all other plugins\n * are required but before any other hits are sent.\n * @param {!Tracker} tracker\n * @param {!Function} fn\n */\nexport function deferUntilPluginsLoaded(tracker, fn) {\n const trackingId = tracker.get('trackingId');\n const ref = queueMap[trackingId] = queueMap[trackingId] || {};\n\n const processQueue = () => {\n clearTimeout(ref.timeout);\n if (ref.send) {\n MethodChain.remove(tracker, 'send', ref.send);\n }\n delete queueMap[trackingId];\n\n ref.queue.forEach((fn) => fn());\n };\n\n clearTimeout(ref.timeout);\n ref.timeout = setTimeout(processQueue, 0);\n ref.queue = ref.queue || [];\n ref.queue.push(fn);\n\n if (!ref.send) {\n ref.send = (originalMethod) => {\n return (...args) => {\n processQueue();\n originalMethod(...args);\n };\n };\n MethodChain.add(tracker, 'send', ref.send);\n }\n}\n\n\n/**\n * A small shim of Object.assign that aims for brevity over spec-compliant\n * handling all the edge cases.\n * @param {!Object} target The target object to assign to.\n * @param {...?Object} sources Additional objects who properties should be\n * assigned to target. Non-objects are converted to objects.\n * @return {!Object} The modified target object.\n */\nexport const assign = Object.assign || function(target, ...sources) {\n for (let i = 0, len = sources.length; i < len; i++) {\n const source = Object(sources[i]);\n for (let key in source) {\n if (Object.prototype.hasOwnProperty.call(source, key)) {\n target[key] = source[key];\n }\n }\n }\n return target;\n};\n\n\n/**\n * Accepts a string containing hyphen or underscore word separators and\n * converts it to camelCase.\n * @param {string} str The string to camelCase.\n * @return {string} The camelCased version of the string.\n */\nexport function camelCase(str) {\n return str.replace(/[\\-\\_]+(\\w?)/g, function(match, p1) {\n return p1.toUpperCase();\n });\n}\n\n\n/**\n * Capitalizes the first letter of a string.\n * @param {string} str The input string.\n * @return {string} The capitalized string\n */\nexport function capitalize(str) {\n return str.charAt(0).toUpperCase() + str.slice(1);\n}\n\n\n/**\n * Indicates whether the passed variable is a JavaScript object.\n * @param {*} value The input variable to test.\n * @return {boolean} Whether or not the test is an object.\n */\nexport function isObject(value) {\n return typeof value == 'object' && value !== null;\n}\n\n\n/**\n * Accepts a value that may or may not be an array. If it is not an array,\n * it is returned as the first item in a single-item array.\n * @param {*} value The value to convert to an array if it is not.\n * @return {!Array} The array-ified value.\n */\nexport function toArray(value) {\n return Array.isArray(value) ? value : [value];\n}\n\n\n/**\n * @return {number} The current date timestamp\n */\nexport function now() {\n return +new Date();\n}\n\n\n/*eslint-disable */\n// https://gist.github.com/jed/982883\n/** @param {?=} a */\nexport const uuid = function b(a){return a?(a^Math.random()*16>>a/4).toString(16):([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g,b)};\n/*eslint-enable */\n","/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\nimport {DEV_ID} from './constants';\nimport {capitalize} from './utilities';\n\n\n/**\n * Provides a plugin for use with analytics.js, accounting for the possibility\n * that the global command queue has been renamed or not yet defined.\n * @param {string} pluginName The plugin name identifier.\n * @param {Function} pluginConstructor The plugin constructor function.\n */\nexport default function provide(pluginName, pluginConstructor) {\n const gaAlias = window.GoogleAnalyticsObject || 'ga';\n window[gaAlias] = window[gaAlias] || function(...args) {\n (window[gaAlias].q = window[gaAlias].q || []).push(args);\n };\n\n // Adds the autotrack dev ID if not already included.\n window.gaDevIds = window.gaDevIds || [];\n if (window.gaDevIds.indexOf(DEV_ID) < 0) {\n window.gaDevIds.push(DEV_ID);\n }\n\n // Formally provides the plugin for use with analytics.js.\n window[gaAlias]('provide', pluginName, pluginConstructor);\n\n // Registers the plugin on the global gaplugins object.\n window.gaplugins = window.gaplugins || {};\n window.gaplugins[capitalize(pluginName)] = pluginConstructor;\n}\n","/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\nexport const VERSION = '2.4.1';\nexport const DEV_ID = 'i5iSjo';\n\nexport const VERSION_PARAM = '_av';\nexport const USAGE_PARAM = '_au';\n\nexport const NULL_DIMENSION = '(not set)';\n","/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\nimport {USAGE_PARAM, VERSION, VERSION_PARAM} from './constants';\n\n\nexport const plugins = {\n CLEAN_URL_TRACKER: 1,\n EVENT_TRACKER: 2,\n IMPRESSION_TRACKER: 3,\n MEDIA_QUERY_TRACKER: 4,\n OUTBOUND_FORM_TRACKER: 5,\n OUTBOUND_LINK_TRACKER: 6,\n PAGE_VISIBILITY_TRACKER: 7,\n SOCIAL_WIDGET_TRACKER: 8,\n URL_CHANGE_TRACKER: 9,\n MAX_SCROLL_TRACKER: 10,\n};\n\n\nconst PLUGIN_COUNT = Object.keys(plugins).length;\n\n\n/**\n * Tracks the usage of the passed plugin by encoding a value into a usage\n * string sent with all hits for the passed tracker.\n * @param {!Tracker} tracker The analytics.js tracker object.\n * @param {number} plugin The plugin enum.\n */\nexport function trackUsage(tracker, plugin) {\n trackVersion(tracker);\n trackPlugin(tracker, plugin);\n}\n\n\n/**\n * Converts a hexadecimal string to a binary string.\n * @param {string} hex A hexadecimal numeric string.\n * @return {string} a binary numeric string.\n */\nfunction convertHexToBin(hex) {\n return parseInt(hex || '0', 16).toString(2);\n}\n\n\n/**\n * Converts a binary string to a hexadecimal string.\n * @param {string} bin A binary numeric string.\n * @return {string} a hexadecimal numeric string.\n */\nfunction convertBinToHex(bin) {\n return parseInt(bin || '0', 2).toString(16);\n}\n\n\n/**\n * Adds leading zeros to a string if it's less than a minimum length.\n * @param {string} str A string to pad.\n * @param {number} len The minimum length of the string\n * @return {string} The padded string.\n */\nfunction padZeros(str, len) {\n if (str.length < len) {\n let toAdd = len - str.length;\n while (toAdd) {\n str = '0' + str;\n toAdd--;\n }\n }\n return str;\n}\n\n\n/**\n * Accepts a binary numeric string and flips the digit from 0 to 1 at the\n * specified index.\n * @param {string} str The binary numeric string.\n * @param {number} index The index to flip the bit.\n * @return {string} The new binary string with the bit flipped on\n */\nfunction flipBitOn(str, index) {\n return str.substr(0, index) + 1 + str.substr(index + 1);\n}\n\n\n/**\n * Accepts a tracker and a plugin index and flips the bit at the specified\n * index on the tracker's usage parameter.\n * @param {Object} tracker An analytics.js tracker.\n * @param {number} pluginIndex The index of the plugin in the global list.\n */\nfunction trackPlugin(tracker, pluginIndex) {\n const usageHex = tracker.get('&' + USAGE_PARAM);\n let usageBin = padZeros(convertHexToBin(usageHex), PLUGIN_COUNT);\n\n // Flip the bit of the plugin being tracked.\n usageBin = flipBitOn(usageBin, PLUGIN_COUNT - pluginIndex);\n\n // Stores the modified usage string back on the tracker.\n tracker.set('&' + USAGE_PARAM, convertBinToHex(usageBin));\n}\n\n\n/**\n * Accepts a tracker and adds the current version to the version param.\n * @param {Object} tracker An analytics.js tracker.\n */\nfunction trackVersion(tracker) {\n tracker.set('&' + VERSION_PARAM, VERSION);\n}\n","/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\nimport {parseUrl} from 'dom-utils';\nimport {NULL_DIMENSION} from '../constants';\nimport MethodChain from '../method-chain';\nimport provide from '../provide';\nimport {plugins, trackUsage} from '../usage';\nimport {assign} from '../utilities';\n\n\n/**\n * Class for the `cleanUrlTracker` analytics.js plugin.\n * @implements {CleanUrlTrackerPublicInterface}\n */\nclass CleanUrlTracker {\n /**\n * Registers clean URL tracking on a tracker object. The clean URL tracker\n * removes query parameters from the page value reported to Google Analytics.\n * It also helps to prevent tracking similar URLs, e.g. sometimes ending a\n * URL with a slash and sometimes not.\n * @param {!Tracker} tracker Passed internally by analytics.js\n * @param {?CleanUrlTrackerOpts} opts Passed by the require command.\n */\n constructor(tracker, opts) {\n trackUsage(tracker, plugins.CLEAN_URL_TRACKER);\n\n /** @type {CleanUrlTrackerOpts} */\n const defaultOpts = {\n // stripQuery: undefined,\n // queryParamsWhitelist: undefined,\n // queryDimensionIndex: undefined,\n // indexFilename: undefined,\n // trailingSlash: undefined,\n // urlFilter: undefined,\n };\n this.opts = /** @type {CleanUrlTrackerOpts} */ (assign(defaultOpts, opts));\n\n this.tracker = tracker;\n\n /** @type {string|null} */\n this.queryDimension = this.opts.stripQuery &&\n this.opts.queryDimensionIndex ?\n `dimension${this.opts.queryDimensionIndex}` : null;\n\n // Binds methods to `this`.\n this.trackerGetOverride = this.trackerGetOverride.bind(this);\n this.buildHitTaskOverride = this.buildHitTaskOverride.bind(this);\n\n // Override built-in tracker method to watch for changes.\n MethodChain.add(tracker, 'get', this.trackerGetOverride);\n MethodChain.add(tracker, 'buildHitTask', this.buildHitTaskOverride);\n }\n\n /**\n * Ensures reads of the tracker object by other plugins always see the\n * \"cleaned\" versions of all URL fields.\n * @param {function(string):*} originalMethod A reference to the overridden\n * method.\n * @return {function(string):*}\n */\n trackerGetOverride(originalMethod) {\n return (field) => {\n if (field == 'page' || field == this.queryDimension) {\n const fieldsObj = /** @type {!FieldsObj} */ ({\n location: originalMethod('location'),\n page: originalMethod('page'),\n });\n const cleanedFieldsObj = this.cleanUrlFields(fieldsObj);\n return cleanedFieldsObj[field];\n } else {\n return originalMethod(field);\n }\n };\n }\n\n /**\n * Cleans URL fields passed in a send command.\n * @param {function(!Model)} originalMethod A reference to the\n * overridden method.\n * @return {function(!Model)}\n */\n buildHitTaskOverride(originalMethod) {\n return (model) => {\n const cleanedFieldsObj = this.cleanUrlFields({\n location: model.get('location'),\n page: model.get('page'),\n });\n model.set(cleanedFieldsObj, null, true);\n originalMethod(model);\n };\n }\n\n /**\n * Accepts of fields object containing URL fields and returns a new\n * fields object with the URLs \"cleaned\" according to the tracker options.\n * @param {!FieldsObj} fieldsObj\n * @return {!FieldsObj}\n */\n cleanUrlFields(fieldsObj) {\n const url = parseUrl(\n /** @type {string} */ (fieldsObj.page || fieldsObj.location));\n\n let pathname = url.pathname;\n\n // If an index filename was provided, remove it if it appears at the end\n // of the URL.\n if (this.opts.indexFilename) {\n const parts = pathname.split('/');\n if (this.opts.indexFilename == parts[parts.length - 1]) {\n parts[parts.length - 1] = '';\n pathname = parts.join('/');\n }\n }\n\n // Ensure the URL ends with or doesn't end with slash based on the\n // `trailingSlash` option. Note that filename URLs should never contain\n // a trailing slash.\n if (this.opts.trailingSlash == 'remove') {\n pathname = pathname.replace(/\\/+$/, '');\n } else if (this.opts.trailingSlash == 'add') {\n const isFilename = /\\.\\w+$/.test(pathname);\n if (!isFilename && pathname.substr(-1) != '/') {\n pathname = pathname + '/';\n }\n }\n\n /** @type {!FieldsObj} */\n const cleanedFieldsObj = {\n page: pathname + (this.opts.stripQuery ?\n this.stripNonWhitelistedQueryParams(url.search) : url.search),\n };\n if (fieldsObj.location) {\n cleanedFieldsObj.location = fieldsObj.location;\n }\n if (this.queryDimension) {\n cleanedFieldsObj[this.queryDimension] =\n url.search.slice(1) || NULL_DIMENSION;\n }\n\n // Apply the `urlFieldsFilter()` option if passed.\n if (typeof this.opts.urlFieldsFilter == 'function') {\n /** @type {!FieldsObj} */\n const userCleanedFieldsObj =\n this.opts.urlFieldsFilter(cleanedFieldsObj, parseUrl);\n\n // Ensure only the URL fields are returned.\n const returnValue = {\n page: userCleanedFieldsObj.page,\n location: userCleanedFieldsObj.location,\n };\n if (this.queryDimension) {\n returnValue[this.queryDimension] =\n userCleanedFieldsObj[this.queryDimension];\n }\n return returnValue;\n } else {\n return cleanedFieldsObj;\n }\n }\n\n /**\n * Accpets a raw URL search string and returns a new search string containing\n * only the site search params (if they exist).\n * @param {string} searchString The URL search string (starting with '?').\n * @return {string} The query string\n */\n stripNonWhitelistedQueryParams(searchString) {\n if (Array.isArray(this.opts.queryParamsWhitelist)) {\n const foundParams = [];\n searchString.slice(1).split('&').forEach((kv) => {\n const [key, value] = kv.split('=');\n if (this.opts.queryParamsWhitelist.indexOf(key) > -1 && value) {\n foundParams.push([key, value]);\n }\n });\n\n return foundParams.length ?\n '?' + foundParams.map((kv) => kv.join('=')).join('&') : '';\n } else {\n return '';\n }\n }\n\n /**\n * Restores all overridden tasks and methods.\n */\n remove() {\n MethodChain.remove(this.tracker, 'get', this.trackerGetOverride);\n MethodChain.remove(this.tracker, 'buildHitTask', this.buildHitTaskOverride);\n }\n}\n\n\nprovide('cleanUrlTracker', CleanUrlTracker);\n","/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\nimport provide from '../provide';\nimport {plugins, trackUsage} from '../usage';\nimport {assign, createFieldsObj,\n domReady, getAttributeFields} from '../utilities';\n\n\n/**\n * Class for the `impressionTracker` analytics.js plugin.\n * @implements {ImpressionTrackerPublicInterface}\n */\nclass ImpressionTracker {\n /**\n * Registers impression tracking.\n * @param {!Tracker} tracker Passed internally by analytics.js\n * @param {?ImpressionTrackerOpts} opts Passed by the require command.\n */\n constructor(tracker, opts) {\n trackUsage(tracker, plugins.IMPRESSION_TRACKER);\n\n // Feature detects to prevent errors in unsupporting browsers.\n if (!(window.IntersectionObserver && window.MutationObserver)) return;\n\n /** type {ImpressionTrackerOpts} */\n const defaultOptions = {\n // elements: undefined,\n rootMargin: '0px',\n fieldsObj: {},\n attributePrefix: 'ga-',\n // hitFilter: undefined,\n };\n\n this.opts = /** type {ImpressionTrackerOpts} */ (\n assign(defaultOptions, opts));\n\n this.tracker = tracker;\n\n // Binds methods.\n this.handleDomMutations = this.handleDomMutations.bind(this);\n this.handleIntersectionChanges = this.handleIntersectionChanges.bind(this);\n this.handleDomElementAdded = this.handleDomElementAdded.bind(this);\n this.handleDomElementRemoved = this.handleDomElementRemoved.bind(this);\n\n /** @type {MutationObserver} */\n this.mutationObserver = null;\n\n // The primary list of elements to observe. Each item contains the\n // element ID, threshold, and whether it's currently in-view.\n this.items = [];\n\n // A map of element IDs in the `items` array to DOM elements in the\n // document. The presence of a key indicates that the element ID is in the\n // `items` array, and the presence of an element value indicates that the\n // element is in the DOM.\n this.elementMap = {};\n\n // A map of threshold values. Each threshold is mapped to an\n // IntersectionObserver instance specific to that threshold.\n this.thresholdMap = {};\n\n // Once the DOM is ready, start observing for changes (if present).\n domReady(() => {\n if (this.opts.elements) {\n this.observeElements(this.opts.elements);\n }\n });\n }\n\n /**\n * Starts observing the passed elements for impressions.\n * @param {Array} elements\n */\n observeElements(elements) {\n const data = this.deriveDataFromElements(elements);\n\n // Merge the new data with the data already on the plugin instance.\n this.items = this.items.concat(data.items);\n this.elementMap = assign({}, data.elementMap, this.elementMap);\n this.thresholdMap = assign({}, data.thresholdMap, this.thresholdMap);\n\n // Observe each new item.\n data.items.forEach((item) => {\n const observer = this.thresholdMap[item.threshold] =\n (this.thresholdMap[item.threshold] || new IntersectionObserver(\n this.handleIntersectionChanges, {\n rootMargin: this.opts.rootMargin,\n threshold: [+item.threshold],\n }));\n\n const element = this.elementMap[item.id] ||\n (this.elementMap[item.id] = document.getElementById(item.id));\n\n if (element) {\n observer.observe(element);\n }\n });\n\n if (!this.mutationObserver) {\n this.mutationObserver = new MutationObserver(this.handleDomMutations);\n this.mutationObserver.observe(document.body, {\n childList: true,\n subtree: true,\n });\n }\n\n // TODO(philipwalton): Remove temporary hack to force a new frame\n // immediately after adding observers.\n // https://bugs.chromium.org/p/chromium/issues/detail?id=612323\n requestAnimationFrame(() => {});\n }\n\n /**\n * Stops observing the passed elements for impressions.\n * @param {Array} elements\n * @return {undefined}\n */\n unobserveElements(elements) {\n const itemsToKeep = [];\n const itemsToRemove = [];\n\n this.items.forEach((item) => {\n const itemInItems = elements.some((element) => {\n const itemToRemove = getItemFromElement(element);\n return itemToRemove.id === item.id &&\n itemToRemove.threshold === item.threshold &&\n itemToRemove.trackFirstImpressionOnly ===\n item.trackFirstImpressionOnly;\n });\n if (itemInItems) {\n itemsToRemove.push(item);\n } else {\n itemsToKeep.push(item);\n }\n });\n\n // If there are no items to keep, run the `unobserveAllElements` logic.\n if (!itemsToKeep.length) {\n this.unobserveAllElements();\n } else {\n const dataToKeep = this.deriveDataFromElements(itemsToKeep);\n const dataToRemove = this.deriveDataFromElements(itemsToRemove);\n\n this.items = dataToKeep.items;\n this.elementMap = dataToKeep.elementMap;\n this.thresholdMap = dataToKeep.thresholdMap;\n\n // Unobserve removed elements.\n itemsToRemove.forEach((item) => {\n if (!dataToKeep.elementMap[item.id]) {\n const observer = dataToRemove.thresholdMap[item.threshold];\n const element = dataToRemove.elementMap[item.id];\n\n if (element) {\n observer.unobserve(element);\n }\n\n // Disconnect unneeded threshold observers.\n if (!dataToKeep.thresholdMap[item.threshold]) {\n dataToRemove.thresholdMap[item.threshold].disconnect();\n }\n }\n });\n }\n }\n\n /**\n * Stops observing all currently observed elements.\n */\n unobserveAllElements() {\n Object.keys(this.thresholdMap).forEach((key) => {\n this.thresholdMap[key].disconnect();\n });\n\n this.mutationObserver.disconnect();\n this.mutationObserver = null;\n\n this.items = [];\n this.elementMap = {};\n this.thresholdMap = {};\n }\n\n /**\n * Loops through each of the passed elements and creates a map of element IDs,\n * threshold values, and a list of \"items\" (which contains each element's\n * `threshold` and `trackFirstImpressionOnly` property).\n * @param {Array} elements A list of elements to derive item data from.\n * @return {Object} An object with the properties `items`, `elementMap`\n * and `threshold`.\n */\n deriveDataFromElements(elements) {\n const items = [];\n const thresholdMap = {};\n const elementMap = {};\n\n if (elements.length) {\n elements.forEach((element) => {\n const item = getItemFromElement(element);\n\n items.push(item);\n elementMap[item.id] = this.elementMap[item.id] || null;\n thresholdMap[item.threshold] =\n this.thresholdMap[item.threshold] || null;\n });\n }\n\n return {items, elementMap, thresholdMap};\n }\n\n /**\n * Handles nodes being added or removed from the DOM. This function is passed\n * as the callback to `this.mutationObserver`.\n * @param {Array} mutations A list of `MutationRecord` instances\n */\n handleDomMutations(mutations) {\n for (let i = 0, mutation; mutation = mutations[i]; i++) {\n // Handles removed elements.\n for (let k = 0, removedEl; removedEl = mutation.removedNodes[k]; k++) {\n this.walkNodeTree(removedEl, this.handleDomElementRemoved);\n }\n // Handles added elements.\n for (let j = 0, addedEl; addedEl = mutation.addedNodes[j]; j++) {\n this.walkNodeTree(addedEl, this.handleDomElementAdded);\n }\n }\n }\n\n /**\n * Iterates through all descendents of a DOM node and invokes the passed\n * callback if any of them match an elememt in `elementMap`.\n * @param {Node} node The DOM node to walk.\n * @param {Function} callback A function to be invoked if a match is found.\n */\n walkNodeTree(node, callback) {\n if (node.nodeType == 1 && node.id in this.elementMap) {\n callback(node.id);\n }\n for (let i = 0, child; child = node.childNodes[i]; i++) {\n this.walkNodeTree(child, callback);\n }\n }\n\n /**\n * Handles intersection changes. This function is passed as the callback to\n * `this.intersectionObserver`\n * @param {Array} records A list of `IntersectionObserverEntry` records.\n */\n handleIntersectionChanges(records) {\n const itemsToRemove = [];\n for (let i = 0, record; record = records[i]; i++) {\n for (let j = 0, item; item = this.items[j]; j++) {\n if (record.target.id !== item.id) continue;\n\n if (isTargetVisible(item.threshold, record)) {\n this.handleImpression(item.id);\n\n if (item.trackFirstImpressionOnly) {\n itemsToRemove.push(item);\n }\n }\n }\n }\n if (itemsToRemove.length) {\n this.unobserveElements(itemsToRemove);\n }\n }\n\n /**\n * Sends a hit to Google Analytics with the impression data.\n * @param {string} id The ID of the element making the impression.\n */\n handleImpression(id) {\n const element = document.getElementById(id);\n\n /** @type {FieldsObj} */\n const defaultFields = {\n transport: 'beacon',\n eventCategory: 'Viewport',\n eventAction: 'impression',\n eventLabel: id,\n nonInteraction: true,\n };\n\n /** @type {FieldsObj} */\n const userFields = assign({}, this.opts.fieldsObj,\n getAttributeFields(element, this.opts.attributePrefix));\n\n this.tracker.send('event', createFieldsObj(defaultFields,\n userFields, this.tracker, this.opts.hitFilter, element));\n }\n\n /**\n * Handles an element in the items array being added to the DOM.\n * @param {string} id The ID of the element that was added.\n */\n handleDomElementAdded(id) {\n const element = this.elementMap[id] = document.getElementById(id);\n this.items.forEach((item) => {\n if (id == item.id) {\n this.thresholdMap[item.threshold].observe(element);\n }\n });\n }\n\n /**\n * Handles an element currently being observed for intersections being\n * removed from the DOM.\n * @param {string} id The ID of the element that was removed.\n */\n handleDomElementRemoved(id) {\n const element = this.elementMap[id];\n this.items.forEach((item) => {\n if (id == item.id) {\n this.thresholdMap[item.threshold].unobserve(element);\n }\n });\n\n this.elementMap[id] = null;\n }\n\n /**\n * Removes all listeners and observers.\n * @private\n */\n remove() {\n this.unobserveAllElements();\n }\n}\n\n\nprovide('impressionTracker', ImpressionTracker);\n\n\n/**\n * Detects whether or not an intersection record represents a visible target\n * given a particular threshold.\n * @param {number} threshold The threshold the target is visible above.\n * @param {IntersectionObserverEntry} record The most recent record entry.\n * @return {boolean} True if the target is visible.\n */\nfunction isTargetVisible(threshold, record) {\n if (threshold === 0) {\n const i = record.intersectionRect;\n return i.top > 0 || i.bottom > 0 || i.left > 0 || i.right > 0;\n } else {\n return record.intersectionRatio >= threshold;\n }\n}\n\n\n/**\n * Creates an item by merging the passed element with the item defaults.\n * If the passed element is just a string, that string is treated as\n * the item ID.\n * @param {!ImpressionTrackerElementsItem|string} element The element to\n * convert to an item.\n * @return {!ImpressionTrackerElementsItem} The item object.\n */\nfunction getItemFromElement(element) {\n /** @type {ImpressionTrackerElementsItem} */\n const defaultOpts = {\n threshold: 0,\n trackFirstImpressionOnly: true,\n };\n\n if (typeof element == 'string') {\n element = /** @type {!ImpressionTrackerElementsItem} */ ({id: element});\n }\n\n return assign(defaultOpts, element);\n}\n","/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\n/**\n * An simple reimplementation of the native Node.js EventEmitter class.\n * The goal of this implementation is to be as small as possible.\n */\nexport default class EventEmitter {\n /**\n * Creates the event registry.\n */\n constructor() {\n this.registry_ = {};\n }\n\n /**\n * Adds a handler function to the registry for the passed event.\n * @param {string} event The event name.\n * @param {!Function} fn The handler to be invoked when the passed\n * event is emitted.\n */\n on(event, fn) {\n this.getRegistry_(event).push(fn);\n }\n\n /**\n * Removes a handler function from the registry for the passed event.\n * @param {string=} event The event name.\n * @param {Function=} fn The handler to be removed.\n */\n off(event = undefined, fn = undefined) {\n if (event && fn) {\n const eventRegistry = this.getRegistry_(event);\n const handlerIndex = eventRegistry.indexOf(fn);\n if (handlerIndex > -1) {\n eventRegistry.splice(handlerIndex, 1);\n }\n } else {\n this.registry_ = {};\n }\n }\n\n /**\n * Runs all registered handlers for the passed event with the optional args.\n * @param {string} event The event name.\n * @param {...*} args The arguments to be passed to the handler.\n */\n emit(event, ...args) {\n this.getRegistry_(event).forEach((fn) => fn(...args));\n }\n\n /**\n * Returns the total number of event handlers currently registered.\n * @return {number}\n */\n getEventCount() {\n let eventCount = 0;\n Object.keys(this.registry_).forEach((event) => {\n eventCount += this.getRegistry_(event).length;\n });\n return eventCount;\n }\n\n /**\n * Returns an array of handlers associated with the passed event name.\n * If no handlers have been registered, an empty array is returned.\n * @private\n * @param {string} event The event name.\n * @return {!Array} An array of handler functions.\n */\n getRegistry_(event) {\n return this.registry_[event] = (this.registry_[event] || []);\n }\n}\n","/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\nimport EventEmitter from './event-emitter';\nimport {assign} from './utilities';\n\n\nconst AUTOTRACK_PREFIX = 'autotrack';\nconst instances = {};\nlet isListening = false;\n\n\n/** @type {boolean|undefined} */\nlet browserSupportsLocalStorage;\n\n\n/**\n * A storage object to simplify interacting with localStorage.\n */\nexport default class Store extends EventEmitter {\n /**\n * Gets an existing instance for the passed arguements or creates a new\n * instance if one doesn't exist.\n * @param {string} trackingId The tracking ID for the GA property.\n * @param {string} namespace A namespace unique to this store.\n * @param {Object=} defaults An optional object of key/value defaults.\n * @return {Store} The Store instance.\n */\n static getOrCreate(trackingId, namespace, defaults) {\n const key = [AUTOTRACK_PREFIX, trackingId, namespace].join(':');\n\n // Don't create multiple instances for the same tracking Id and namespace.\n if (!instances[key]) {\n instances[key] = new Store(key, defaults);\n if (!isListening) initStorageListener();\n }\n return instances[key];\n }\n\n /**\n * Returns true if the browser supports and can successfully write to\n * localStorage. The results is cached so this method can be invoked many\n * times with no extra performance cost.\n * @private\n * @return {boolean}\n */\n static isSupported_() {\n if (browserSupportsLocalStorage != null) {\n return browserSupportsLocalStorage;\n }\n\n try {\n window.localStorage.setItem(AUTOTRACK_PREFIX, AUTOTRACK_PREFIX);\n window.localStorage.removeItem(AUTOTRACK_PREFIX);\n browserSupportsLocalStorage = true;\n } catch (err) {\n browserSupportsLocalStorage = false;\n }\n return browserSupportsLocalStorage;\n }\n\n /**\n * Wraps the native localStorage method for each stubbing in tests.\n * @private\n * @param {string} key The store key.\n * @return {string|null} The stored value.\n */\n static get_(key) {\n return window.localStorage.getItem(key);\n }\n\n /**\n * Wraps the native localStorage method for each stubbing in tests.\n * @private\n * @param {string} key The store key.\n * @param {string} value The value to store.\n */\n static set_(key, value) {\n window.localStorage.setItem(key, value);\n }\n\n /**\n * Wraps the native localStorage method for each stubbing in tests.\n * @private\n * @param {string} key The store key.\n */\n static clear_(key) {\n window.localStorage.removeItem(key);\n }\n\n /**\n * @param {string} key A key unique to this store.\n * @param {Object=} defaults An optional object of key/value defaults.\n */\n constructor(key, defaults = {}) {\n super();\n this.key_ = key;\n this.defaults_ = defaults;\n\n /** @type {?Object} */\n this.cache_ = null; // Will be set after the first get.\n }\n\n /**\n * Gets the data stored in localStorage for this store. If the cache is\n * already populated, return it as is (since it's always kept up-to-date\n * and in sync with activity in other windows via the `storage` event).\n * TODO(philipwalton): Implement schema migrations if/when a new\n * schema version is introduced.\n * @return {!Object} The stored data merged with the defaults.\n */\n get() {\n if (this.cache_) {\n return this.cache_;\n } else {\n if (Store.isSupported_()) {\n try {\n this.cache_ = parse(Store.get_(this.key_));\n } catch(err) {\n // Do nothing.\n }\n }\n return this.cache_ = assign({}, this.defaults_, this.cache_);\n }\n }\n\n /**\n * Saves the passed data object to localStorage,\n * merging it with the existing data.\n * @param {Object} newData The data to save.\n */\n set(newData) {\n this.cache_ = assign({}, this.defaults_, this.cache_, newData);\n\n if (Store.isSupported_()) {\n try {\n Store.set_(this.key_, JSON.stringify(this.cache_));\n } catch(err) {\n // Do nothing.\n }\n }\n }\n\n /**\n * Clears the data in localStorage for the current store.\n */\n clear() {\n this.cache_ = {};\n if (Store.isSupported_()) {\n try {\n Store.clear_(this.key_);\n } catch(err) {\n // Do nothing.\n }\n }\n }\n\n /**\n * Removes the store instance for the global instances map. If this is the\n * last store instance, the storage listener is also removed.\n * Note: this does not erase the stored data. Use `clear()` for that.\n */\n destroy() {\n delete instances[this.key_];\n if (!Object.keys(instances).length) {\n removeStorageListener();\n }\n }\n}\n\n\n/**\n * Adds a single storage event listener and flips the global `isListening`\n * flag so multiple events aren't added.\n */\nfunction initStorageListener() {\n window.addEventListener('storage', storageListener);\n isListening = true;\n}\n\n\n/**\n * Removes the storage event listener and flips the global `isListening`\n * flag so it can be re-added later.\n */\nfunction removeStorageListener() {\n window.removeEventListener('storage', storageListener);\n isListening = false;\n}\n\n\n/**\n * The global storage event listener.\n * @param {!Event} event The DOM event.\n */\nfunction storageListener(event) {\n const store = instances[event.key];\n if (store) {\n const oldData = assign({}, store.defaults_, parse(event.oldValue));\n const newData = assign({}, store.defaults_, parse(event.newValue));\n\n store.cache_ = newData;\n store.emit('externalSet', newData, oldData);\n }\n}\n\n\n/**\n * Parses a source string as JSON\n * @param {string|null} source\n * @return {!Object} The JSON object.\n */\nfunction parse(source) {\n let data = {};\n if (source) {\n try {\n data = /** @type {!Object} */ (JSON.parse(source));\n } catch(err) {\n // Do nothing.\n }\n }\n return data;\n}\n","/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\nimport MethodChain from './method-chain';\nimport Store from './store';\nimport {now, uuid} from './utilities';\n\n\nconst SECONDS = 1000;\nconst MINUTES = 60 * SECONDS;\n\n\nconst instances = {};\n\n\n/**\n * A session management class that helps track session boundaries\n * across multiple open tabs/windows.\n */\nexport default class Session {\n /**\n * Gets an existing instance for the passed arguments or creates a new\n * instance if one doesn't exist.\n * @param {!Tracker} tracker An analytics.js tracker object.\n * @param {number} timeout The session timeout (in minutes). This value\n * should match what's set in the \"Session settings\" section of the\n * Google Analytics admin.\n * @param {string=} timeZone The optional IANA time zone of the view. This\n * value should match what's set in the \"View settings\" section of the\n * Google Analytics admin. (Note: this assumes all views for the property\n * use the same time zone. If that's not true, it's better not to use\n * this feature).\n * @return {Session} The Session instance.\n */\n static getOrCreate(tracker, timeout, timeZone) {\n // Don't create multiple instances for the same property.\n const trackingId = tracker.get('trackingId');\n if (instances[trackingId]) {\n return instances[trackingId];\n } else {\n return instances[trackingId] = new Session(tracker, timeout, timeZone);\n }\n }\n\n /**\n * @param {!Tracker} tracker An analytics.js tracker object.\n * @param {number} timeout The session timeout (in minutes). This value\n * should match what's set in the \"Session settings\" section of the\n * Google Analytics admin.\n * @param {string=} timeZone The optional IANA time zone of the view. This\n * value should match what's set in the \"View settings\" section of the\n * Google Analytics admin. (Note: this assumes all views for the property\n * use the same time zone. If that's not true, it's better not to use\n * this feature).\n */\n constructor(tracker, timeout, timeZone) {\n this.tracker = tracker;\n this.timeout = timeout || Session.DEFAULT_TIMEOUT;\n this.timeZone = timeZone;\n\n // Binds methods.\n this.sendHitTaskOverride = this.sendHitTaskOverride.bind(this);\n\n // Overrides into the trackers sendHitTask method.\n MethodChain.add(tracker, 'sendHitTask', this.sendHitTaskOverride);\n\n // Some browser doesn't support various features of the\n // `Intl.DateTimeFormat` API, so we have to try/catch it. Consequently,\n // this allows us to assume the presence of `this.dateTimeFormatter` means\n // it works in the current browser.\n try {\n this.dateTimeFormatter =\n new Intl.DateTimeFormat('en-US', {timeZone: this.timeZone});\n } catch(err) {\n // Do nothing.\n }\n\n /** @type {SessionStoreData} */\n const defaultProps = {\n hitTime: 0,\n isExpired: false,\n };\n this.store = Store.getOrCreate(\n tracker.get('trackingId'), 'session', defaultProps);\n\n // Ensure the session has an ID.\n if (!this.store.get().id) {\n this.store.set(/** @type {SessionStoreData} */ ({id: uuid()}));\n }\n }\n\n /**\n * Returns the ID of the current session.\n * @return {string}\n */\n getId() {\n return this.store.get().id;\n }\n\n /**\n * Accepts a session ID and returns true if the specified session has\n * evidentially expired. A session can expire for two reasons:\n * - More than 30 minutes has elapsed since the previous hit\n * was sent (The 30 minutes number is the Google Analytics default, but\n * it can be modified in GA admin \"Session settings\").\n * - A new day has started since the previous hit, in the\n * specified time zone (should correspond to the time zone of the\n * property's views).\n *\n * Note: since real session boundaries are determined at processing time,\n * this is just a best guess rather than a source of truth.\n *\n * @param {string} id The ID of a session to check for expiry.\n * @return {boolean} True if the session has not exp\n */\n isExpired(id = this.getId()) {\n // If a session ID is passed and it doesn't match the current ID,\n // assume it's from an expired session. If no ID is passed, assume the ID\n // of the current session.\n if (id != this.getId()) return true;\n\n /** @type {SessionStoreData} */\n const sessionData = this.store.get();\n\n // `isExpired` will be `true` if the sessionControl field was set to\n // 'end' on the previous hit.\n if (sessionData.isExpired) return true;\n\n const oldHitTime = sessionData.hitTime;\n\n // Only consider a session expired if previous hit time data exists, and\n // the previous hit time is greater than that session timeout period or\n // the hits occurred on different days in the session timezone.\n if (oldHitTime) {\n const currentDate = new Date();\n const oldHitDate = new Date(oldHitTime);\n if (currentDate - oldHitDate > (this.timeout * MINUTES) ||\n this.datesAreDifferentInTimezone(currentDate, oldHitDate)) {\n return true;\n }\n }\n\n // For all other cases return false.\n return false;\n }\n\n /**\n * Returns true if (and only if) the timezone date formatting is supported\n * in the current browser and if the two dates are definitively not the\n * same date in the session timezone. Anything short of this returns false.\n * @param {!Date} d1\n * @param {!Date} d2\n * @return {boolean}\n */\n datesAreDifferentInTimezone(d1, d2) {\n if (!this.dateTimeFormatter) {\n return false;\n } else {\n return this.dateTimeFormatter.format(d1)\n != this.dateTimeFormatter.format(d2);\n }\n }\n\n /**\n * Keeps track of when the previous hit was sent to determine if a session\n * has expired. Also inspects the `sessionControl` field to handles\n * expiration accordingly.\n * @param {function(!Model)} originalMethod A reference to the overridden\n * method.\n * @return {function(!Model)}\n */\n sendHitTaskOverride(originalMethod) {\n return (model) => {\n originalMethod(model);\n\n const sessionControl = model.get('sessionControl');\n const sessionWillStart = sessionControl == 'start' || this.isExpired();\n const sessionWillEnd = sessionControl == 'end';\n\n /** @type {SessionStoreData} */\n const sessionData = this.store.get();\n sessionData.hitTime = now();\n if (sessionWillStart) {\n sessionData.isExpired = false;\n sessionData.id = uuid();\n }\n if (sessionWillEnd) {\n sessionData.isExpired = true;\n }\n this.store.set(sessionData);\n };\n }\n\n /**\n * Restores the tracker's original `sendHitTask` to the state before\n * session control was initialized and removes this instance from the global\n * store.\n */\n destroy() {\n MethodChain.remove(this.tracker, 'sendHitTask', this.sendHitTaskOverride);\n this.store.destroy();\n delete instances[this.tracker.get('trackingId')];\n }\n}\n\n\nSession.DEFAULT_TIMEOUT = 30; // minutes\n","/**\n * Copyright 2017 Google Inc. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\nimport {parseUrl} from 'dom-utils';\nimport MethodChain from '../method-chain';\nimport provide from '../provide';\nimport Session from '../session';\nimport Store from '../store';\nimport {plugins, trackUsage} from '../usage';\nimport {assign, createFieldsObj, debounce, isObject} from '../utilities';\n\n\n/**\n * Class for the `maxScrollQueryTracker` analytics.js plugin.\n * @implements {MaxScrollTrackerPublicInterface}\n */\nclass MaxScrollTracker {\n /**\n * Registers outbound link tracking on tracker object.\n * @param {!Tracker} tracker Passed internally by analytics.js\n * @param {?Object} opts Passed by the require command.\n */\n constructor(tracker, opts) {\n trackUsage(tracker, plugins.MAX_SCROLL_TRACKER);\n\n // Feature detects to prevent errors in unsupporting browsers.\n if (!window.addEventListener) return;\n\n /** @type {MaxScrollTrackerOpts} */\n const defaultOpts = {\n increaseThreshold: 20,\n sessionTimeout: Session.DEFAULT_TIMEOUT,\n // timeZone: undefined,\n // maxScrollMetricIndex: undefined,\n fieldsObj: {},\n // hitFilter: undefined\n };\n\n this.opts = /** @type {MaxScrollTrackerOpts} */ (\n assign(defaultOpts, opts));\n\n this.tracker = tracker;\n this.pagePath = this.getPagePath();\n\n // Binds methods to `this`.\n this.handleScroll = debounce(this.handleScroll.bind(this), 500);\n this.trackerSetOverride = this.trackerSetOverride.bind(this);\n\n // Creates the store and binds storage change events.\n this.store = Store.getOrCreate(\n tracker.get('trackingId'), 'plugins/max-scroll-tracker');\n\n // Creates the session and binds session events.\n this.session = Session.getOrCreate(\n tracker, this.opts.sessionTimeout, this.opts.timeZone);\n\n // Override the built-in tracker.set method to watch for changes.\n MethodChain.add(tracker, 'set', this.trackerSetOverride);\n\n this.listenForMaxScrollChanges();\n }\n\n\n /**\n * Adds a scroll event listener if the max scroll percentage for the\n * current page isn't already at 100%.\n */\n listenForMaxScrollChanges() {\n const maxScrollPercentage = this.getMaxScrollPercentageForCurrentPage();\n if (maxScrollPercentage < 100) {\n window.addEventListener('scroll', this.handleScroll);\n }\n }\n\n\n /**\n * Removes an added scroll listener.\n */\n stopListeningForMaxScrollChanges() {\n window.removeEventListener('scroll', this.handleScroll);\n }\n\n\n /**\n * Handles the scroll event. If the current scroll percentage is greater\n * that the stored scroll event by at least the specified increase threshold,\n * send an event with the increase amount.\n */\n handleScroll() {\n const pageHeight = getPageHeight();\n const scrollPos = window.pageYOffset; // scrollY isn't supported in IE.\n const windowHeight = window.innerHeight;\n\n // Ensure scrollPercentage is an integer between 0 and 100.\n const scrollPercentage = Math.min(100, Math.max(0,\n Math.round(100 * (scrollPos / (pageHeight - windowHeight)))));\n\n // If the max scroll data gets out of the sync with the session data\n // (for whatever reason), clear it.\n const sessionId = this.session.getId();\n if (sessionId != this.store.get().sessionId) {\n this.store.clear();\n this.store.set({sessionId});\n }\n\n // If the session has expired, clear the stored data and don't send any\n // events (since they'd start a new session). Note: this check is needed,\n // in addition to the above check, to handle cases where the session IDs\n // got out of sync, but the session didn't expire.\n if (this.session.isExpired(this.store.get().sessionId)) {\n this.store.clear();\n } else {\n const maxScrollPercentage = this.getMaxScrollPercentageForCurrentPage();\n\n if (scrollPercentage > maxScrollPercentage) {\n if (scrollPercentage == 100 || maxScrollPercentage == 100) {\n this.stopListeningForMaxScrollChanges();\n }\n const increaseAmount = scrollPercentage - maxScrollPercentage;\n if (scrollPercentage == 100 ||\n increaseAmount >= this.opts.increaseThreshold) {\n this.setMaxScrollPercentageForCurrentPage(scrollPercentage);\n this.sendMaxScrollEvent(increaseAmount, scrollPercentage);\n }\n }\n }\n }\n\n /**\n * Detects changes to the tracker object and triggers an update if the page\n * field has changed.\n * @param {function((Object|string), (string|undefined))} originalMethod\n * A reference to the overridden method.\n * @return {function((Object|string), (string|undefined))}\n */\n trackerSetOverride(originalMethod) {\n return (field, value) => {\n originalMethod(field, value);\n\n /** @type {!FieldsObj} */\n const fields = isObject(field) ? field : {[field]: value};\n if (fields.page) {\n const lastPagePath = this.pagePath;\n this.pagePath = this.getPagePath();\n\n if (this.pagePath != lastPagePath) {\n // Since event listeners for the same function are never added twice,\n // we don't need to worry about whether we're already listening. We\n // can just add the event listener again.\n this.listenForMaxScrollChanges();\n }\n }\n };\n }\n\n /**\n * Sends an event for the increased max scroll percentage amount.\n * @param {number} increaseAmount\n * @param {number} scrollPercentage\n */\n sendMaxScrollEvent(increaseAmount, scrollPercentage) {\n /** @type {FieldsObj} */\n const defaultFields = {\n transport: 'beacon',\n eventCategory: 'Max Scroll',\n eventAction: 'increase',\n eventValue: increaseAmount,\n eventLabel: String(scrollPercentage),\n nonInteraction: true,\n };\n\n // If a custom metric was specified, set it equal to the event value.\n if (this.opts.maxScrollMetricIndex) {\n defaultFields['metric' + this.opts.maxScrollMetricIndex] = increaseAmount;\n }\n\n this.tracker.send('event',\n createFieldsObj(defaultFields, this.opts.fieldsObj,\n this.tracker, this.opts.hitFilter));\n }\n\n /**\n * Stores the current max scroll percentage for the current page.\n * @param {number} maxScrollPercentage\n */\n setMaxScrollPercentageForCurrentPage(maxScrollPercentage) {\n this.store.set({\n [this.pagePath]: maxScrollPercentage,\n sessionId: this.session.getId(),\n });\n }\n\n /**\n * Gets the stored max scroll percentage for the current page.\n * @return {number}\n */\n getMaxScrollPercentageForCurrentPage() {\n return this.store.get()[this.pagePath] || 0;\n }\n\n /**\n * Gets the page path from the tracker object.\n * @return {number}\n */\n getPagePath() {\n const url = parseUrl(\n this.tracker.get('page') || this.tracker.get('location'));\n return url.pathname + url.search;\n }\n\n /**\n * Removes all event listeners and restores overridden methods.\n */\n remove() {\n this.session.destroy();\n this.stopListeningForMaxScrollChanges();\n MethodChain.remove(this.tracker, 'set', this.trackerSetOverride);\n }\n}\n\n\nprovide('maxScrollTracker', MaxScrollTracker);\n\n\n/**\n * Gets the maximum height of the page including scrollable area.\n * @return {number}\n */\nfunction getPageHeight() {\n const html = document.documentElement;\n const body = document.body;\n return Math.max(html.offsetHeight, html.scrollHeight,\n body.offsetHeight, body.scrollHeight);\n}\n","/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\nimport {NULL_DIMENSION} from '../constants';\nimport provide from '../provide';\nimport {plugins, trackUsage} from '../usage';\nimport {assign, createFieldsObj,\n debounce, isObject, toArray} from '../utilities';\n\n\n/**\n * Declares the MediaQueryList instance cache.\n */\nconst mediaMap = {};\n\n\n/**\n * Class for the `mediaQueryTracker` analytics.js plugin.\n * @implements {MediaQueryTrackerPublicInterface}\n */\nclass MediaQueryTracker {\n /**\n * Registers media query tracking.\n * @param {!Tracker} tracker Passed internally by analytics.js\n * @param {?Object} opts Passed by the require command.\n */\n constructor(tracker, opts) {\n trackUsage(tracker, plugins.MEDIA_QUERY_TRACKER);\n\n // Feature detects to prevent errors in unsupporting browsers.\n if (!window.matchMedia) return;\n\n /** @type {MediaQueryTrackerOpts} */\n const defaultOpts = {\n // definitions: unefined,\n changeTemplate: this.changeTemplate,\n changeTimeout: 1000,\n fieldsObj: {},\n // hitFilter: undefined,\n };\n\n this.opts = /** @type {MediaQueryTrackerOpts} */ (\n assign(defaultOpts, opts));\n\n // Exits early if media query data doesn't exist.\n if (!isObject(this.opts.definitions)) return;\n\n this.opts.definitions = toArray(this.opts.definitions);\n this.tracker = tracker;\n this.changeListeners = [];\n\n this.processMediaQueries();\n }\n\n /**\n * Loops through each media query definition, sets the custom dimenion data,\n * and adds the change listeners.\n */\n processMediaQueries() {\n this.opts.definitions.forEach((definition) => {\n // Only processes definitions with a name and index.\n if (definition.name && definition.dimensionIndex) {\n const mediaName = this.getMatchName(definition);\n this.tracker.set('dimension' + definition.dimensionIndex, mediaName);\n\n this.addChangeListeners(definition);\n }\n });\n }\n\n /**\n * Takes a definition object and return the name of the matching media item.\n * If no match is found, the NULL_DIMENSION value is returned.\n * @param {Object} definition A set of named media queries associated\n * with a single custom dimension.\n * @return {string} The name of the matched media or NULL_DIMENSION.\n */\n getMatchName(definition) {\n let match;\n\n definition.items.forEach((item) => {\n if (getMediaList(item.media).matches) {\n match = item;\n }\n });\n return match ? match.name : NULL_DIMENSION;\n }\n\n /**\n * Adds change listeners to each media query in the definition list.\n * Debounces the changes to prevent unnecessary hits from being sent.\n * @param {Object} definition A set of named media queries associated\n * with a single custom dimension\n */\n addChangeListeners(definition) {\n definition.items.forEach((item) => {\n const mql = getMediaList(item.media);\n const fn = debounce(() => {\n this.handleChanges(definition);\n }, this.opts.changeTimeout);\n\n mql.addListener(fn);\n this.changeListeners.push({mql, fn});\n });\n }\n\n /**\n * Handles changes to the matched media. When the new value differs from\n * the old value, a change event is sent.\n * @param {Object} definition A set of named media queries associated\n * with a single custom dimension\n */\n handleChanges(definition) {\n const newValue = this.getMatchName(definition);\n const oldValue = this.tracker.get('dimension' + definition.dimensionIndex);\n\n if (newValue !== oldValue) {\n this.tracker.set('dimension' + definition.dimensionIndex, newValue);\n\n /** @type {FieldsObj} */\n const defaultFields = {\n transport: 'beacon',\n eventCategory: definition.name,\n eventAction: 'change',\n eventLabel: this.opts.changeTemplate(oldValue, newValue),\n nonInteraction: true,\n };\n this.tracker.send('event', createFieldsObj(defaultFields,\n this.opts.fieldsObj, this.tracker, this.opts.hitFilter));\n }\n }\n\n /**\n * Removes all event listeners and instance properties.\n */\n remove() {\n for (let i = 0, listener; listener = this.changeListeners[i]; i++) {\n listener.mql.removeListener(listener.fn);\n }\n }\n\n /**\n * Sets the default formatting of the change event label.\n * This can be overridden by setting the `changeTemplate` option.\n * @param {string} oldValue The value of the media query prior to the change.\n * @param {string} newValue The value of the media query after the change.\n * @return {string} The formatted event label.\n */\n changeTemplate(oldValue, newValue) {\n return oldValue + ' => ' + newValue;\n }\n}\n\n\nprovide('mediaQueryTracker', MediaQueryTracker);\n\n\n/**\n * Accepts a media query and returns a MediaQueryList object.\n * Caches the values to avoid multiple unnecessary instances.\n * @param {string} media A media query value.\n * @return {MediaQueryList} The matched media.\n */\nfunction getMediaList(media) {\n return mediaMap[media] || (mediaMap[media] = window.matchMedia(media));\n}\n","/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\nimport {delegate, parseUrl} from 'dom-utils';\nimport provide from '../provide';\nimport {plugins, trackUsage} from '../usage';\nimport {assign, createFieldsObj,\n getAttributeFields, withTimeout} from '../utilities';\n\n\n/**\n * Class for the `outboundFormTracker` analytics.js plugin.\n * @implements {OutboundFormTrackerPublicInterface}\n */\nclass OutboundFormTracker {\n /**\n * Registers outbound form tracking.\n * @param {!Tracker} tracker Passed internally by analytics.js\n * @param {?Object} opts Passed by the require command.\n */\n constructor(tracker, opts) {\n trackUsage(tracker, plugins.OUTBOUND_FORM_TRACKER);\n\n // Feature detects to prevent errors in unsupporting browsers.\n if (!window.addEventListener) return;\n\n /** @type {OutboundFormTrackerOpts} */\n const defaultOpts = {\n formSelector: 'form',\n shouldTrackOutboundForm: this.shouldTrackOutboundForm,\n fieldsObj: {},\n attributePrefix: 'ga-',\n // hitFilter: undefined\n };\n\n this.opts = /** @type {OutboundFormTrackerOpts} */ (\n assign(defaultOpts, opts));\n\n this.tracker = tracker;\n\n this.delegate = delegate(document, 'submit', this.opts.formSelector,\n this.handleFormSubmits.bind(this), {composed: true, useCapture: true});\n }\n\n /**\n * Handles all submits on form elements. A form submit is considered outbound\n * if its action attribute starts with http and does not contain\n * location.hostname.\n * When the beacon transport method is not available, the event's default\n * action is prevented and re-emitted after the hit is sent.\n * @param {Event} event The DOM submit event.\n * @param {Element} form The delegated event target.\n */\n handleFormSubmits(event, form) {\n const action = parseUrl(form.action).href;\n\n /** @type {FieldsObj} */\n const defaultFields = {\n transport: 'beacon',\n eventCategory: 'Outbound Form',\n eventAction: 'submit',\n eventLabel: action,\n };\n\n if (this.opts.shouldTrackOutboundForm(form, parseUrl)) {\n if (!navigator.sendBeacon) {\n // Stops the submit and waits until the hit is complete (with timeout)\n // for browsers that don't support beacon.\n event.preventDefault();\n defaultFields.hitCallback = withTimeout(function() {\n form.submit();\n });\n }\n\n const userFields = assign({}, this.opts.fieldsObj,\n getAttributeFields(form, this.opts.attributePrefix));\n\n this.tracker.send('event', createFieldsObj(\n defaultFields, userFields,\n this.tracker, this.opts.hitFilter, form, event));\n }\n }\n\n /**\n * Determines whether or not the tracker should send a hit when a form is\n * submitted. By default, forms with an action attribute that starts with\n * \"http\" and doesn't contain the current hostname are tracked.\n * @param {Element} form The form that was submitted.\n * @param {Function} parseUrlFn A cross-browser utility method for url\n * parsing (note: renamed to disambiguate when compiling).\n * @return {boolean} Whether or not the form should be tracked.\n */\n shouldTrackOutboundForm(form, parseUrlFn) {\n const url = parseUrlFn(form.action);\n return url.hostname != location.hostname &&\n url.protocol.slice(0, 4) == 'http';\n }\n\n /**\n * Removes all event listeners and instance properties.\n */\n remove() {\n this.delegate.destroy();\n }\n}\n\n\nprovide('outboundFormTracker', OutboundFormTracker);\n","/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\nimport {delegate, parseUrl} from 'dom-utils';\nimport provide from '../provide';\nimport {plugins, trackUsage} from '../usage';\nimport {assign, createFieldsObj,\n getAttributeFields, withTimeout} from '../utilities';\n\n\n/**\n * Class for the `outboundLinkTracker` analytics.js plugin.\n * @implements {OutboundLinkTrackerPublicInterface}\n */\nclass OutboundLinkTracker {\n /**\n * Registers outbound link tracking on a tracker object.\n * @param {!Tracker} tracker Passed internally by analytics.js\n * @param {?Object} opts Passed by the require command.\n */\n constructor(tracker, opts) {\n trackUsage(tracker, plugins.OUTBOUND_LINK_TRACKER);\n\n // Feature detects to prevent errors in unsupporting browsers.\n if (!window.addEventListener) return;\n\n /** @type {OutboundLinkTrackerOpts} */\n const defaultOpts = {\n events: ['click'],\n linkSelector: 'a, area',\n shouldTrackOutboundLink: this.shouldTrackOutboundLink,\n fieldsObj: {},\n attributePrefix: 'ga-',\n // hitFilter: undefined,\n };\n\n this.opts = /** @type {OutboundLinkTrackerOpts} */ (\n assign(defaultOpts, opts));\n\n this.tracker = tracker;\n\n // Binds methods.\n this.handleLinkInteractions = this.handleLinkInteractions.bind(this);\n\n // Creates a mapping of events to their delegates\n this.delegates = {};\n this.opts.events.forEach((event) => {\n this.delegates[event] = delegate(document, event, this.opts.linkSelector,\n this.handleLinkInteractions, {composed: true, useCapture: true});\n });\n }\n\n /**\n * Handles all interactions on link elements. A link is considered an outbound\n * link if its hostname property does not match location.hostname. When the\n * beacon transport method is not available, the links target is set to\n * \"_blank\" to ensure the hit can be sent.\n * @param {Event} event The DOM click event.\n * @param {Element} link The delegated event target.\n */\n handleLinkInteractions(event, link) {\n if (this.opts.shouldTrackOutboundLink(link, parseUrl)) {\n const href = link.getAttribute('href') || link.getAttribute('xlink:href');\n const url = parseUrl(href);\n\n /** @type {FieldsObj} */\n const defaultFields = {\n transport: 'beacon',\n eventCategory: 'Outbound Link',\n eventAction: event.type,\n eventLabel: url.href,\n };\n\n /** @type {FieldsObj} */\n const userFields = assign({}, this.opts.fieldsObj,\n getAttributeFields(link, this.opts.attributePrefix));\n\n const fieldsObj = createFieldsObj(defaultFields, userFields,\n this.tracker, this.opts.hitFilter, link, event);\n\n if (!navigator.sendBeacon &&\n linkClickWillUnloadCurrentPage(event, link)) {\n // Adds a new event handler at the last minute to minimize the chances\n // that another event handler for this click will run after this logic.\n const clickHandler = () => {\n window.removeEventListener('click', clickHandler);\n\n // Checks to make sure another event handler hasn't already prevented\n // the default action. If it has the custom redirect isn't needed.\n if (!event.defaultPrevented) {\n // Stops the click and waits until the hit is complete (with\n // timeout) for browsers that don't support beacon.\n event.preventDefault();\n\n const oldHitCallback = fieldsObj.hitCallback;\n fieldsObj.hitCallback = withTimeout(function() {\n if (typeof oldHitCallback == 'function') oldHitCallback();\n location.href = href;\n });\n }\n this.tracker.send('event', fieldsObj);\n };\n window.addEventListener('click', clickHandler);\n } else {\n this.tracker.send('event', fieldsObj);\n }\n }\n }\n\n /**\n * Determines whether or not the tracker should send a hit when a link is\n * clicked. By default links with a hostname property not equal to the current\n * hostname are tracked.\n * @param {Element} link The link that was clicked on.\n * @param {Function} parseUrlFn A cross-browser utility method for url\n * parsing (note: renamed to disambiguate when compiling).\n * @return {boolean} Whether or not the link should be tracked.\n */\n shouldTrackOutboundLink(link, parseUrlFn) {\n const href = link.getAttribute('href') || link.getAttribute('xlink:href');\n const url = parseUrlFn(href);\n return url.hostname != location.hostname &&\n url.protocol.slice(0, 4) == 'http';\n }\n\n /**\n * Removes all event listeners and instance properties.\n */\n remove() {\n Object.keys(this.delegates).forEach((key) => {\n this.delegates[key].destroy();\n });\n }\n}\n\n\nprovide('outboundLinkTracker', OutboundLinkTracker);\n\n\n/**\n * Determines if a link click event will cause the current page to upload.\n * Note: most link clicks *will* cause the current page to unload because they\n * initiate a page navigation. The most common reason a link click won't cause\n * the page to unload is if the clicked was to open the link in a new tab.\n * @param {Event} event The DOM event.\n * @param {Element} link The link element clicked on.\n * @return {boolean} True if the current page will be unloaded.\n */\nfunction linkClickWillUnloadCurrentPage(event, link) {\n return !(\n // The event type can be customized; we only care about clicks here.\n event.type != 'click' ||\n // Links with target=\"_blank\" set will open in a new window/tab.\n link.target == '_blank' ||\n // On mac, command clicking will open a link in a new tab. Control\n // clicking does this on windows.\n event.metaKey || event.ctrlKey ||\n // Shift clicking in Chrome/Firefox opens the link in a new window\n // In Safari it adds the URL to a favorites list.\n event.shiftKey ||\n // On Mac, clicking with the option key is used to download a resouce.\n event.altKey ||\n // Middle mouse button clicks (which == 2) are used to open a link\n // in a new tab, and right clicks (which == 3) on Firefox trigger\n // a click event.\n event.which > 1);\n}\n","/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\nimport {NULL_DIMENSION} from '../constants';\nimport MethodChain from '../method-chain';\nimport provide from '../provide';\nimport Session from '../session';\nimport Store from '../store';\nimport {plugins, trackUsage} from '../usage';\nimport {assign, createFieldsObj, deferUntilPluginsLoaded,\n isObject, now, uuid} from '../utilities';\n\n\nconst HIDDEN = 'hidden';\nconst VISIBLE = 'visible';\nconst PAGE_ID = uuid();\nconst SECONDS = 1000;\n\n\n/**\n * Class for the `pageVisibilityTracker` analytics.js plugin.\n * @implements {PageVisibilityTrackerPublicInterface}\n */\nclass PageVisibilityTracker {\n /**\n * Registers outbound link tracking on tracker object.\n * @param {!Tracker} tracker Passed internally by analytics.js\n * @param {?Object} opts Passed by the require command.\n */\n constructor(tracker, opts) {\n trackUsage(tracker, plugins.PAGE_VISIBILITY_TRACKER);\n\n // Feature detects to prevent errors in unsupporting browsers.\n if (!document.visibilityState) return;\n\n /** @type {PageVisibilityTrackerOpts} */\n const defaultOpts = {\n sessionTimeout: Session.DEFAULT_TIMEOUT,\n visibleThreshold: 5 * SECONDS,\n // timeZone: undefined,\n sendInitialPageview: false,\n // pageLoadsMetricIndex: undefined,\n // visibleMetricIndex: undefined,\n fieldsObj: {},\n // hitFilter: undefined\n };\n\n this.opts = /** @type {PageVisibilityTrackerOpts} */ (\n assign(defaultOpts, opts));\n\n this.tracker = tracker;\n this.lastPageState = document.visibilityState;\n this.visibleThresholdTimeout_ = null;\n this.isInitialPageviewSent_ = false;\n\n // Binds methods to `this`.\n this.trackerSetOverride = this.trackerSetOverride.bind(this);\n this.handleChange = this.handleChange.bind(this);\n this.handleWindowUnload = this.handleWindowUnload.bind(this);\n this.handleExternalStoreSet = this.handleExternalStoreSet.bind(this);\n\n // Creates the store and binds storage change events.\n this.store = Store.getOrCreate(\n tracker.get('trackingId'), 'plugins/page-visibility-tracker');\n this.store.on('externalSet', this.handleExternalStoreSet);\n\n // Creates the session and binds session events.\n this.session = Session.getOrCreate(\n tracker, this.opts.sessionTimeout, this.opts.timeZone);\n\n // Override the built-in tracker.set method to watch for changes.\n MethodChain.add(tracker, 'set', this.trackerSetOverride);\n\n window.addEventListener('unload', this.handleWindowUnload);\n document.addEventListener('visibilitychange', this.handleChange);\n\n // Postpone sending any hits until the next call stack, which allows all\n // autotrack plugins to be required sync before any hits are sent.\n deferUntilPluginsLoaded(this.tracker, () => {\n if (document.visibilityState == VISIBLE) {\n if (this.opts.sendInitialPageview) {\n this.sendPageview({isPageLoad: true});\n this.isInitialPageviewSent_ = true;\n }\n this.store.set(/** @type {PageVisibilityStoreData} */ ({\n time: now(),\n state: VISIBLE,\n pageId: PAGE_ID,\n sessionId: this.session.getId(),\n }));\n } else {\n if (this.opts.sendInitialPageview && this.opts.pageLoadsMetricIndex) {\n this.sendPageLoad();\n }\n }\n });\n }\n\n /**\n * Inspects the last visibility state change data and determines if a\n * visibility event needs to be tracked based on the current visibility\n * state and whether or not the session has expired. If the session has\n * expired, a change to `visible` will trigger an additional pageview.\n * This method also sends as the event value (and optionally a custom metric)\n * the elapsed time between this event and the previously reported change\n * in the same session, allowing you to more accurately determine when users\n * were actually looking at your page versus when it was in the background.\n */\n handleChange() {\n if (!(document.visibilityState == VISIBLE ||\n document.visibilityState == HIDDEN)) {\n return;\n }\n\n const lastStoredChange = this.getAndValidateChangeData();\n\n /** @type {PageVisibilityStoreData} */\n const change = {\n time: now(),\n state: document.visibilityState,\n pageId: PAGE_ID,\n sessionId: this.session.getId(),\n };\n\n // If the visibilityState has changed to visible and the initial pageview\n // has not been sent (and the `sendInitialPageview` option is `true`).\n // Send the initial pageview now.\n if (document.visibilityState == VISIBLE &&\n this.opts.sendInitialPageview && !this.isInitialPageviewSent_) {\n this.sendPageview();\n this.isInitialPageviewSent_ = true;\n }\n\n // If the visibilityState has changed to hidden, clear any scheduled\n // pageviews waiting for the visibleThreshold timeout.\n if (document.visibilityState == HIDDEN && this.visibleThresholdTimeout_) {\n clearTimeout(this.visibleThresholdTimeout_);\n }\n\n if (this.session.isExpired(lastStoredChange.sessionId)) {\n this.store.clear();\n if (this.lastPageState == HIDDEN &&\n document.visibilityState == VISIBLE) {\n // If the session has expired, changes from hidden to visible should\n // be considered a new pageview rather than a visibility event.\n // This behavior ensures all sessions contain a pageview so\n // session-level page dimensions and metrics (e.g. ga:landingPagePath\n // and ga:entrances) are correct.\n // Also, in order to prevent false positives, we add a small timeout\n // that is cleared if the visibilityState changes to hidden shortly\n // after the change to visible. This can happen if a user is quickly\n // switching through their open tabs but not actually interacting with\n // and of them. It can also happen when a user goes to a tab just to\n // immediately close it. Such cases should not be considered pageviews.\n clearTimeout(this.visibleThresholdTimeout_);\n this.visibleThresholdTimeout_ = setTimeout(() => {\n this.store.set(change);\n this.sendPageview({hitTime: change.time});\n }, this.opts.visibleThreshold);\n }\n } else {\n if (lastStoredChange.pageId == PAGE_ID &&\n lastStoredChange.state == VISIBLE) {\n this.sendPageVisibilityEvent(lastStoredChange);\n }\n this.store.set(change);\n }\n\n this.lastPageState = document.visibilityState;\n }\n\n /**\n * Retroactively updates the stored change data in cases where it's known to\n * be out of sync.\n * This plugin keeps track of each visiblity change and stores the last one\n * in localStorage. LocalStorage is used to handle situations where the user\n * has multiple page open at the same time and we don't want to\n * double-report page visibility in those cases.\n * However, a problem can occur if a user closes a page when one or more\n * visible pages are still open. In such cases it's impossible to know\n * which of the remaining pages the user will interact with next.\n * To solve this problem we wait for the next change on any page and then\n * retroactively update the stored data to reflect the current page as being\n * the page on which the last change event occured and measure visibility\n * from that point.\n * @return {!PageVisibilityStoreData}\n */\n getAndValidateChangeData() {\n const lastStoredChange =\n /** @type {PageVisibilityStoreData} */ (this.store.get());\n\n if (this.lastPageState == VISIBLE &&\n lastStoredChange.state == HIDDEN &&\n lastStoredChange.pageId != PAGE_ID) {\n lastStoredChange.state = VISIBLE;\n lastStoredChange.pageId = PAGE_ID;\n this.store.set(lastStoredChange);\n }\n return lastStoredChange;\n }\n\n /**\n * Sends a Page Visibility event to track the time this page was in the\n * visible state (assuming it was in that state long enough to meet the\n * threshold).\n * @param {!PageVisibilityStoreData} lastStoredChange\n * @param {{hitTime: (number|undefined)}=} param1\n * - hitTime: A hit timestap used to help ensure original order in cases\n * where the send is delayed.\n */\n sendPageVisibilityEvent(lastStoredChange, {hitTime} = {}) {\n const delta = this.getTimeSinceLastStoredChange(\n lastStoredChange, {hitTime});\n\n // If the detla is greater than the visibileThreshold, report it.\n if (delta && delta >= this.opts.visibleThreshold) {\n const deltaInSeconds = Math.round(delta / SECONDS);\n\n /** @type {FieldsObj} */\n const defaultFields = {\n transport: 'beacon',\n nonInteraction: true,\n eventCategory: 'Page Visibility',\n eventAction: 'track',\n eventValue: deltaInSeconds,\n eventLabel: NULL_DIMENSION,\n };\n\n if (hitTime) {\n defaultFields.queueTime = now() - hitTime;\n }\n\n // If a custom metric was specified, set it equal to the event value.\n if (this.opts.visibleMetricIndex) {\n defaultFields['metric' + this.opts.visibleMetricIndex] = deltaInSeconds;\n }\n\n this.tracker.send('event',\n createFieldsObj(defaultFields, this.opts.fieldsObj,\n this.tracker, this.opts.hitFilter));\n }\n }\n\n /**\n * Sends a page load event.\n */\n sendPageLoad() {\n /** @type {FieldsObj} */\n const defaultFields = {\n transport: 'beacon',\n eventCategory: 'Page Visibility',\n eventAction: 'page load',\n eventLabel: NULL_DIMENSION,\n ['metric' + this.opts.pageLoadsMetricIndex]: 1,\n nonInteraction: true,\n };\n this.tracker.send('event',\n createFieldsObj(defaultFields, this.opts.fieldsObj,\n this.tracker, this.opts.hitFilter));\n }\n\n /**\n * Sends a pageview, optionally calculating an offset if hitTime is passed.\n * @param {{\n * hitTime: (number|undefined),\n * isPageLoad: (boolean|undefined)\n * }=} param1\n * hitTime: The timestamp of the current hit.\n * isPageLoad: True if this pageview was also a page load.\n */\n sendPageview({hitTime, isPageLoad} = {}) {\n /** @type {FieldsObj} */\n const defaultFields = {transport: 'beacon'};\n if (hitTime) {\n defaultFields.queueTime = now() - hitTime;\n }\n if (isPageLoad && this.opts.pageLoadsMetricIndex) {\n defaultFields['metric' + this.opts.pageLoadsMetricIndex] = 1;\n }\n\n this.tracker.send('pageview',\n createFieldsObj(defaultFields, this.opts.fieldsObj,\n this.tracker, this.opts.hitFilter));\n }\n\n /**\n * Detects changes to the tracker object and triggers an update if the page\n * field has changed.\n * @param {function((Object|string), (string|undefined))} originalMethod\n * A reference to the overridden method.\n * @return {function((Object|string), (string|undefined))}\n */\n trackerSetOverride(originalMethod) {\n return (field, value) => {\n /** @type {!FieldsObj} */\n const fields = isObject(field) ? field : {[field]: value};\n if (fields.page && fields.page !== this.tracker.get('page')) {\n if (this.lastPageState == VISIBLE) {\n this.handleChange();\n }\n }\n originalMethod(field, value);\n };\n }\n\n /**\n * Calculates the time since the last visibility change event in the current\n * session. If the session has expired the reported time is zero.\n * @param {PageVisibilityStoreData} lastStoredChange\n * @param {{hitTime: (number|undefined)}=} param1\n * hitTime: The time of the current hit (defaults to now).\n * @return {number} The time (in ms) since the last change.\n */\n getTimeSinceLastStoredChange(lastStoredChange, {hitTime} = {}) {\n return lastStoredChange.time ?\n (hitTime || now()) - lastStoredChange.time : 0;\n }\n\n /**\n * Handles responding to the `storage` event.\n * The code on this page needs to be informed when other tabs or windows are\n * updating the stored page visibility state data. This method checks to see\n * if a hidden state is stored when there are still visible tabs open, which\n * can happen if multiple windows are open at the same time.\n * @param {PageVisibilityStoreData} newData\n * @param {PageVisibilityStoreData} oldData\n */\n handleExternalStoreSet(newData, oldData) {\n // If the change times are the same, then the previous write only\n // updated the active page ID. It didn't enter a new state and thus no\n // hits should be sent.\n if (newData.time == oldData.time) return;\n\n // Page Visibility events must be sent by the tracker on the page\n // where the original event occurred. So if a change happens on another\n // page, but this page is where the previous change event occurred, then\n // this page is the one that needs to send the event (so all dimension\n // data is correct).\n if (oldData.pageId == PAGE_ID &&\n oldData.state == VISIBLE &&\n !this.session.isExpired(oldData.sessionId)) {\n this.sendPageVisibilityEvent(oldData, {hitTime: newData.time});\n }\n }\n\n /**\n * Handles responding to the `unload` event.\n * Since some browsers don't emit a `visibilitychange` event in all cases\n * where a page might be unloaded, it's necessary to hook into the `unload`\n * event to ensure the correct state is always stored.\n */\n handleWindowUnload() {\n // If the stored visibility state isn't hidden when the unload event\n // fires, it means the visibilitychange event didn't fire as the document\n // was being unloaded, so we invoke it manually.\n if (this.lastPageState != HIDDEN) {\n this.handleChange();\n }\n }\n\n /**\n * Removes all event listeners and restores overridden methods.\n */\n remove() {\n this.store.destroy();\n this.session.destroy();\n MethodChain.remove(this.tracker, 'set', this.trackerSetOverride);\n window.removeEventListener('unload', this.handleWindowUnload);\n document.removeEventListener('visibilitychange', this.handleChange);\n }\n}\n\n\nprovide('pageVisibilityTracker', PageVisibilityTracker);\n","/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\nimport provide from '../provide';\nimport {plugins, trackUsage} from '../usage';\nimport {assign, createFieldsObj} from '../utilities';\n\n\n/**\n * Class for the `socialWidgetTracker` analytics.js plugin.\n * @implements {SocialWidgetTrackerPublicInterface}\n */\nclass SocialWidgetTracker {\n /**\n * Registers social tracking on tracker object.\n * Supports both declarative social tracking via HTML attributes as well as\n * tracking for social events when using official Twitter or Facebook widgets.\n * @param {!Tracker} tracker Passed internally by analytics.js\n * @param {?Object} opts Passed by the require command.\n */\n constructor(tracker, opts) {\n trackUsage(tracker, plugins.SOCIAL_WIDGET_TRACKER);\n\n // Feature detects to prevent errors in unsupporting browsers.\n if (!window.addEventListener) return;\n\n /** @type {SocialWidgetTrackerOpts} */\n const defaultOpts = {\n fieldsObj: {},\n hitFilter: null,\n };\n\n this.opts = /** @type {SocialWidgetTrackerOpts} */ (\n assign(defaultOpts, opts));\n\n this.tracker = tracker;\n\n // Binds methods to `this`.\n this.addWidgetListeners = this.addWidgetListeners.bind(this);\n this.addTwitterEventHandlers = this.addTwitterEventHandlers.bind(this);\n this.handleTweetEvents = this.handleTweetEvents.bind(this);\n this.handleFollowEvents = this.handleFollowEvents.bind(this);\n this.handleLikeEvents = this.handleLikeEvents.bind(this);\n this.handleUnlikeEvents = this.handleUnlikeEvents.bind(this);\n\n if (document.readyState != 'complete') {\n // Adds the widget listeners after the window's `load` event fires.\n // If loading widgets using the officially recommended snippets, they\n // will be available at `window.load`. If not users can call the\n // `addWidgetListeners` method manually.\n window.addEventListener('load', this.addWidgetListeners);\n } else {\n this.addWidgetListeners();\n }\n }\n\n\n /**\n * Invokes the methods to add Facebook and Twitter widget event listeners.\n * Ensures the respective global namespaces are present before adding.\n */\n addWidgetListeners() {\n if (window.FB) this.addFacebookEventHandlers();\n if (window.twttr) this.addTwitterEventHandlers();\n }\n\n /**\n * Adds event handlers for the \"tweet\" and \"follow\" events emitted by the\n * official tweet and follow buttons. Note: this does not capture tweet or\n * follow events emitted by other Twitter widgets (tweet, timeline, etc.).\n */\n addTwitterEventHandlers() {\n try {\n window.twttr.ready(() => {\n window.twttr.events.bind('tweet', this.handleTweetEvents);\n window.twttr.events.bind('follow', this.handleFollowEvents);\n });\n } catch(err) {\n // Do nothing.\n }\n }\n\n /**\n * Removes event handlers for the \"tweet\" and \"follow\" events emitted by the\n * official tweet and follow buttons.\n */\n removeTwitterEventHandlers() {\n try {\n window.twttr.ready(() => {\n window.twttr.events.unbind('tweet', this.handleTweetEvents);\n window.twttr.events.unbind('follow', this.handleFollowEvents);\n });\n } catch(err) {\n // Do nothing.\n }\n }\n\n /**\n * Adds event handlers for the \"like\" and \"unlike\" events emitted by the\n * official Facebook like button.\n */\n addFacebookEventHandlers() {\n try {\n window.FB.Event.subscribe('edge.create', this.handleLikeEvents);\n window.FB.Event.subscribe('edge.remove', this.handleUnlikeEvents);\n } catch(err) {\n // Do nothing.\n }\n }\n\n /**\n * Removes event handlers for the \"like\" and \"unlike\" events emitted by the\n * official Facebook like button.\n */\n removeFacebookEventHandlers() {\n try {\n window.FB.Event.unsubscribe('edge.create', this.handleLikeEvents);\n window.FB.Event.unsubscribe('edge.remove', this.handleUnlikeEvents);\n } catch(err) {\n // Do nothing.\n }\n }\n\n /**\n * Handles `tweet` events emitted by the Twitter JS SDK.\n * @param {TwttrEvent} event The Twitter event object passed to the handler.\n */\n handleTweetEvents(event) {\n // Ignores tweets from widgets that aren't the tweet button.\n if (event.region != 'tweet') return;\n\n const url = event.data.url || event.target.getAttribute('data-url') ||\n location.href;\n\n /** @type {FieldsObj} */\n const defaultFields = {\n transport: 'beacon',\n socialNetwork: 'Twitter',\n socialAction: 'tweet',\n socialTarget: url,\n };\n this.tracker.send('social',\n createFieldsObj(defaultFields, this.opts.fieldsObj,\n this.tracker, this.opts.hitFilter, event.target, event));\n }\n\n /**\n * Handles `follow` events emitted by the Twitter JS SDK.\n * @param {TwttrEvent} event The Twitter event object passed to the handler.\n */\n handleFollowEvents(event) {\n // Ignore follows from widgets that aren't the follow button.\n if (event.region != 'follow') return;\n\n const screenName = event.data.screen_name ||\n event.target.getAttribute('data-screen-name');\n\n /** @type {FieldsObj} */\n const defaultFields = {\n transport: 'beacon',\n socialNetwork: 'Twitter',\n socialAction: 'follow',\n socialTarget: screenName,\n };\n this.tracker.send('social',\n createFieldsObj(defaultFields, this.opts.fieldsObj,\n this.tracker, this.opts.hitFilter, event.target, event));\n }\n\n /**\n * Handles `like` events emitted by the Facebook JS SDK.\n * @param {string} url The URL corresponding to the like event.\n */\n handleLikeEvents(url) {\n /** @type {FieldsObj} */\n const defaultFields = {\n transport: 'beacon',\n socialNetwork: 'Facebook',\n socialAction: 'like',\n socialTarget: url,\n };\n this.tracker.send('social', createFieldsObj(defaultFields,\n this.opts.fieldsObj, this.tracker, this.opts.hitFilter));\n }\n\n /**\n * Handles `unlike` events emitted by the Facebook JS SDK.\n * @param {string} url The URL corresponding to the unlike event.\n */\n handleUnlikeEvents(url) {\n /** @type {FieldsObj} */\n const defaultFields = {\n transport: 'beacon',\n socialNetwork: 'Facebook',\n socialAction: 'unlike',\n socialTarget: url,\n };\n this.tracker.send('social', createFieldsObj(defaultFields,\n this.opts.fieldsObj, this.tracker, this.opts.hitFilter));\n }\n\n /**\n * Removes all event listeners and instance properties.\n */\n remove() {\n window.removeEventListener('load', this.addWidgetListeners);\n this.removeFacebookEventHandlers();\n this.removeTwitterEventHandlers();\n }\n}\n\n\nprovide('socialWidgetTracker', SocialWidgetTracker);\n","/**\n * Copyright 2016 Google Inc. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n\nimport MethodChain from '../method-chain';\nimport provide from '../provide';\nimport {plugins, trackUsage} from '../usage';\nimport {assign, createFieldsObj} from '../utilities';\n\n\n/**\n * Class for the `urlChangeTracker` analytics.js plugin.\n * @implements {UrlChangeTrackerPublicInterface}\n */\nclass UrlChangeTracker {\n /**\n * Adds handler for the history API methods\n * @param {!Tracker} tracker Passed internally by analytics.js\n * @param {?Object} opts Passed by the require command.\n */\n constructor(tracker, opts) {\n trackUsage(tracker, plugins.URL_CHANGE_TRACKER);\n\n // Feature detects to prevent errors in unsupporting browsers.\n if (!history.pushState || !window.addEventListener) return;\n\n /** @type {UrlChangeTrackerOpts} */\n const defaultOpts = {\n shouldTrackUrlChange: this.shouldTrackUrlChange,\n trackReplaceState: false,\n fieldsObj: {},\n hitFilter: null,\n };\n\n this.opts = /** @type {UrlChangeTrackerOpts} */ (assign(defaultOpts, opts));\n\n this.tracker = tracker;\n\n // Sets the initial page field.\n // Don't set this on the tracker yet so campaign data can be retreived\n // from the location field.\n this.path = getPath();\n\n // Binds methods.\n this.pushStateOverride = this.pushStateOverride.bind(this);\n this.replaceStateOverride = this.replaceStateOverride.bind(this);\n this.handlePopState = this.handlePopState.bind(this);\n\n // Watches for history changes.\n MethodChain.add(history, 'pushState', this.pushStateOverride);\n MethodChain.add(history, 'replaceState', this.replaceStateOverride);\n window.addEventListener('popstate', this.handlePopState);\n }\n\n /**\n * Handles invocations of the native `history.pushState` and calls\n * `handleUrlChange()` indicating that the history updated.\n * @param {!Function} originalMethod A reference to the overridden method.\n * @return {!Function}\n */\n pushStateOverride(originalMethod) {\n return (...args) => {\n originalMethod(...args);\n this.handleUrlChange(true);\n };\n }\n\n /**\n * Handles invocations of the native `history.replaceState` and calls\n * `handleUrlChange()` indicating that history was replaced.\n * @param {!Function} originalMethod A reference to the overridden method.\n * @return {!Function}\n */\n replaceStateOverride(originalMethod) {\n return (...args) => {\n originalMethod(...args);\n this.handleUrlChange(false);\n };\n }\n\n /**\n * Handles responding to the popstate event and calls\n * `handleUrlChange()` indicating that history was updated.\n */\n handlePopState() {\n this.handleUrlChange(true);\n }\n\n /**\n * Updates the page and title fields on the tracker and sends a pageview\n * if a new history entry was created.\n * @param {boolean} historyDidUpdate True if the history was changed via\n * `pushState()` or the `popstate` event. False if the history was just\n * modified via `replaceState()`.\n */\n handleUrlChange(historyDidUpdate) {\n // Calls the update logic asychronously to help ensure that app logic\n // responding to the URL change happens prior to this.\n setTimeout(() => {\n const oldPath = this.path;\n const newPath = getPath();\n\n if (oldPath != newPath &&\n this.opts.shouldTrackUrlChange.call(this, newPath, oldPath)) {\n this.path = newPath;\n this.tracker.set({\n page: newPath,\n title: document.title,\n });\n\n if (historyDidUpdate || this.opts.trackReplaceState) {\n /** @type {FieldsObj} */\n const defaultFields = {transport: 'beacon'};\n this.tracker.send('pageview', createFieldsObj(defaultFields,\n this.opts.fieldsObj, this.tracker, this.opts.hitFilter));\n }\n }\n }, 0);\n }\n\n /**\n * Determines whether or not the tracker should send a hit with the new page\n * data. This default implementation can be overrided in the config options.\n * @param {string} newPath The path after the URL change.\n * @param {string} oldPath The path prior to the URL change.\n * @return {boolean} Whether or not the URL change should be tracked.\n */\n shouldTrackUrlChange(newPath, oldPath) {\n return !!(newPath && oldPath);\n }\n\n /**\n * Removes all event listeners and restores overridden methods.\n */\n remove() {\n MethodChain.remove(history, 'pushState', this.pushStateOverride);\n MethodChain.remove(history, 'replaceState', this.replaceStateOverride);\n window.removeEventListener('popstate', this.handlePopState);\n }\n}\n\n\nprovide('urlChangeTracker', UrlChangeTracker);\n\n\n/**\n * @return {string} The path value of the current URL.\n */\nfunction getPath() {\n return location.pathname + location.search;\n}\n",null,null,null,"window.addEvent('domready', function () {\r\n // Add IE class\r\n if (Browser.ie) {\r\n document.id(document.body).addClass('ie');\r\n }\r\n\r\n // Add GA tracking attributes\r\n $$(document.links).filter(function (a) {\r\n if (a.href.test('.pdf$', 'i')) {\r\n a.set({\r\n 'ga-on': 'click',\r\n 'ga-event-category': 'Download',\r\n 'ga-event-action': 'click',\r\n 'ga-event-label': a.href\r\n });\r\n }\r\n });\r\n\r\n // Barometer\r\n $$('#container .barometer .content').each(function (element) {\r\n var barometer = new Barometer(element, {\r\n ga_tracker: window.pageTracker,\r\n ga_actions_delay: {\r\n show: 2000\r\n }\r\n });\r\n\r\n // Get custom tracking category\r\n var name = element.getElement('h2'),\r\n period = element.getElement('p');\r\n if (name) {\r\n barometer.options.ga_category = name.get('text');\r\n if (period) {\r\n barometer.options.ga_category += ' ' + period.get('text');\r\n }\r\n }\r\n });\r\n\r\n // Open external links in new window\r\n $$(document.links).filter(function (a) {\r\n return !a.getProperty('target') && // Already has a target attribute\r\n (a.href.test('^http', 'i') && !a.href.test('^' + document.location.href.substring(0, document.location.href.indexOf('/', 8)), 'i')) || // Different domain name\r\n a.href.test('.pdf$', 'i') || // PDF extension\r\n (a.getProperty('rel') && a.getProperty('rel').contains('external', ' ')); // External link\r\n }).setProperty('target', '_blank');\r\n});"]}