var Preloader=new Class({initialize:function(){this._currentlyLoading='';this._loading=false;this._imgQueue=[];this._loadEvents={};this._loadedImages={};},addToQueue:function(src){if(this.isLoaded(src)||this.isInQueue(src))return;this._imgQueue.push(src);if(!this._loading)this._loadNext();return this;},addToFrontOfQueue:function(src){if(this.isLoaded(src))return false;if(this._currentlyLoading==src)return true;this.removeFromQueue(src);this._imgQueue.unshift(src);if(!this._loading)this._loadNext();return true;},removeFromQueue:function(src){this._imgQueue.remove(src)
return this;},addEventOnLoad:function(src,fn){this._loadEvents[src]=fn;return this;},flushQueue:function(){this._imgQueue=[];return this;},stopAllEvents:function(){this._loadEvents={};return this;},isLoaded:function(src){return!!this._loadedImages[src];},isInQueue:function(src){return(this._currentlyLoading==src||this._imgQueue.contains(src));},priorityLoadWithCallback:function(src,fn){this.addEventOnLoad(src,fn);if(!this.addToFrontOfQueue(src)){this._fireLoadEvent(src);return true;}
return false;},_fireLoadEvent:function(src){if(this._loadEvents[src])this._loadEvents[src].call(this._loadedImages[src]);this._loadEvents[src]=null;},_loadNext:function(){if(this._imgQueue.length==0){this._currentlyLoading='';return this._loading=false;}
this._loading=true;this._currentlyLoading=this._imgQueue.shift();var img=new Element('img');var preloader=this;img.addEvent('load',function(){preloader._loadedImages[this.src]=this;preloader._currentlyLoading='';preloader._fireLoadEvent(this.src);setTimeout(function(){preloader._loadNext();},0);this.removeEvent('load',arguments.callee);});img.src=this._currentlyLoading;}});
1;