$extend(Element.NativeEvents,{hashchange:1});var HashListener=new Class({Implements:[Options,Events],options:{blank_page:'blank.html',start:false},iframe:null,currentHash:'',firstLoad:true,handle:false,useIframe:(Browser.Engine.trident&&(typeof(document.documentMode)=='undefined'||document.documentMode<8)),ignoreLocationChange:false,initialize:function(options){var $this=this;this.setOptions(options);if(Browser.Engine.presto&&window.history.navigationMode){window.history.navigationMode='compatible';} if(('onhashchange' in window)&&(typeof(document.documentMode)=='undefined'||document.documentMode>7)){window.addEvent('hashchange',function(){var hash=$this.getHash();if(hash==$this.currentHash){return;} $this.fireEvent('hashChanged',hash);$this.fireEvent('hash-changed',hash);});;}else{if(this.useIframe){this.initializeHistoryIframe();}} window.addEvent('unload',function(event){$this.firstLoad=null;});if(this.options.start)this.start();},initializeHistoryIframe:function(){var hash=this.getHash(),doc;this.iframe=new IFrame({src:this.options.blank_page,styles:{'position':'absolute','top':0,'left':0,'width':'1px','height':'1px','visibility':'hidden'}}).inject(document.body);doc=(this.iframe.contentDocument)?this.iframe.contentDocument:this.iframe.contentWindow.document;doc.open();doc.write(''+hash+'');doc.close();return;},checkHash:function(){var hash=this.getHash(),ie_state,doc;if(this.ignoreLocationChange){this.ignoreLocationChange=false;return;} if(this.useIframe){doc=(this.iframe.contentDocument)?this.iframe.contentDocumnet:this.iframe.contentWindow.document;ie_state=doc.body.innerHTML;if(ie_state!=hash){this.setHash(ie_state);hash=ie_state;}} if(this.currentLocation==hash){return;} this.currentLocation=hash;this.fireEvent('hashChanged',hash);this.fireEvent('hash-changed',hash);},setHash:function(newHash){window.location.hash=this.currentLocation=newHash;if(('onhashchange' in window)&&(typeof(document.documentMode)=='undefined'||document.documentMode>7))return;this.fireEvent('hashChanged',newHash);this.fireEvent('hash-changed',newHash);},getHash:function(){var m;if(Browser.Engine.gecko){m=/#(.*)$/.exec(window.location.href);return m&&m[1]?m[1]:'';}else if(Browser.Engine.webkit){return decodeURI(window.location.hash.substr(1));}else{return window.location.hash.substr(1);}},setIframeHash:function(newHash){var doc=(this.iframe.contentDocument)?this.iframe.contentDocumnet:this.iframe.contentWindow.document;doc.open();doc.write(''+newHash+'');doc.close();},updateHash:function(newHash){if($type(document.id(newHash))){this.debug_msg("Exception: History locations can not have the same value as _any_ IDs that might be in the document," +" due to a bug in IE; please ask the developer to choose a history location that does not match any HTML" +" IDs in this document. The following ID is already taken and cannot be a location: " +newLocation);} this.ignoreLocationChange=true;if(this.useIframe)this.setIframeHash(newHash);else this.setHash(newHash);},start:function(){this.handle=this.checkHash.periodical(100,this);},stop:function(){$clear(this.handle);}});