/*
 
Correctly handle PNG transparency in Win IE 5.5 & 6.
http://homepage.ntlworld.com/bobosola. Updated 18-Jan-2006.

Use in <HEAD> with DEFER keyword wrapped in conditional comments:
<!--[if lt IE 7]>
<script defer type="text/javascript" src="pngfix.js"></script>
<![endif]-->

*/

var PNG = new Class({
	
	initialize: function(container) {
		this.arVersion = navigator.appVersion.split("MSIE");
		this.version = parseFloat(this.arVersion[1]);
		
		if (container) this.fix(container);
	},

	fix: function(container,show) {
		if ((this.version >= 5.5) && (document.body.filters)) 
		{
			var fiximgs = $(container).getElements('img');
		
			fiximgs.each(function(img,i){
				var imgName = img.src.toUpperCase()
				if (imgName.substring(imgName.length-3, imgName.length) == "PNG")
				{
					var tmp = new Element('div').cloneEvents(img);
				
					var imgID = (img.id) ? "id='" + img.id + "' " : ""
					var imgClass = (img.className) ? "class=\"pngfix " + img.className + "\" " : "class=\"pngfix\" "
					var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' "
					var imgStyle = "display:inline-block;" + img.style.cssText 
					if (img.align == "left") imgStyle = "float:left;" + imgStyle
					if (img.align == "right") imgStyle = "float:right;" + imgStyle
					if (img.getParent() && img.getParent().href) imgStyle = "cursor:hand;" + imgStyle
					var strNewHTML = "<span " + imgID + imgClass + imgTitle
					+ " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
					+ "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
					+ "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>" 
					img.outerHTML = strNewHTML;
					var availableSpans = container.getElements('span.pngfix');
					if (tmp && tmp.$events) availableSpans[i].cloneEvents(tmp);
				}
			});
		}
	}
	
});

var pngFix;

window.addEvent('domready',function(){
	pngFix = new PNG(window.document);
});
