/*
 
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]-->

*/

window.onload = function()
{
	correctPNG();
	alphaBackgrounds();	
}


function correctPNG(){
	var arVersion = navigator.appVersion.split("MSIE")
	var version = parseFloat(arVersion[1])	
	
	if ((version >= 5.5) && (document.body) && (document.body.filters)) {
		for(var i=0; i<document.images.length; i++) {
			var img = document.images[i];
			var imgName = img.src.toUpperCase();
			if (imgName.substring(imgName.length-3, imgName.length) == "PNG") {
				var imgID = (img.id) ? "id='" + img.id + "' " : "";
				var imgClass = (img.className) ? "class='" + img.className + "' " : "";
				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.parentElement.href) imgStyle = "cursor:pointer;" + imgStyle;
				var strNewHTML = "<span " + imgID + imgClass + imgTitle;
				strNewHTML += " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";";
				strNewHTML += "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader";
				strNewHTML += "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>";
				img.outerHTML = strNewHTML;
				i = i-1;
			}
		}
	}
}

function alphaBackgrounds(){
	var rslt = navigator.appVersion.match(/MSIE (\d+\.\d+)/, '');
	var itsAllGood = (rslt != null && Number(rslt[1]) >= 5.5);
	for (i=0; i<document.all.length; i++){
		var bg = document.all[i].currentStyle.backgroundImage;
		if (itsAllGood && bg){
			if (bg.match(/\.png/i) != null){
				var mypng = bg.substring(5,bg.length-2);
				// here's the the sizingMethod property 2 of 2
				
				document.all[i].style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, src='"+mypng+"', sizingMethod='crop')";
				document.all[i].style.backgroundImage =  "none";
			}
		}
	}	
}