//MooTools More, <http://mootools.net/more>. Copyright (c) 2006-2008 Valerio Proietti, <http://mad4milk.net>, MIT Style License.

var Asset=new Hash({javascript:function(source,properties){properties=$extend({onload:$empty,document:document,check:$lambda(true)},properties);var script=new Element('script',{'src':source,'type':'text/javascript'});var load=properties.onload.bind(script),check=properties.check,doc=properties.document;delete properties.onload;delete properties.check;delete properties.document;script.addEvents({load:load,readystatechange:function(){if(['loaded','complete'].contains(this.readyState))load();}}).setProperties(properties);if(Browser.Engine.webkit419)var checker=(function(){if(!$try(check))return;$clear(checker);load();}).periodical(50);return script.inject(doc.head);},css:function(source,properties){return new Element('link',$merge({'rel':'stylesheet','media':'screen','type':'text/css','href':source},properties)).inject(document.head);},image:function(source,properties){properties=$merge({'onload':$empty,'onabort':$empty,'onerror':$empty},properties);var image=new Image();var element=$(image)||new Element('img');['load','abort','error'].each(function(name){var type='on'+name;var event=properties[type];delete properties[type];image[type]=function(){if(!image)return;if(!element.parentNode){element.width=image.width;element.height=image.height;}
image=image.onload=image.onabort=image.onerror=null;event.delay(1,element,element);element.fireEvent(name,element,1);};});image.src=element.src=source;if(image&&image.complete)image.onload.delay(1);return element.setProperties(properties);},images:function(sources,options){options=$merge({onComplete:$empty,onProgress:$empty},options);if(!sources.push)sources=[sources];var images=[];var counter=0;sources.each(function(source){var img=new Asset.image(source,{'onload':function(){options.onProgress.call(this,counter,sources.indexOf(source));counter++;if(counter==sources.length)options.onComplete();}});images.push(img);});return new Elements(images);}});