var ImagePreload=Class.create();ImagePreload.prototype={initialize:function(imagenames,options){this.imagenames=imagenames;this.images=[];this.setOptions(options);this.preloadImages();},setOptions:function(options){this.options={onFinish:Prototype.emptyFunction,pause:30}
Object.extend(this.options,options||{});},preloadImages:function(){for(var n=0;n<this.imagenames.length;n++){this.images[n]=new Image();this.images[n].src='/_files/pix/'+this.imagenames[n];setTimeout(new Function('this.checkImageLoad('+n+')').bind(this),this.options.pause);}},checkImageLoad:function(index){if(this.images[index].complete){this.imageLoaded();}else{setTimeout(new Function('this.checkImageLoad('+index+')').bind(this),this.options.pause);}},imageLoaded:function(){if(!this.loadedImages){this.loadedImages=0;}
this.loadedImages++;if(this.loadedImages>=this.imagenames.length&&!this.finished){this.finished=true;var callback=this.options.onFinish||Prototype.emptyFunction;callback(this.images);}}}