var arVersion = navigator.appVersion.split("MSIE") 
var version = parseFloat(arVersion[1]) 

function correctPNG() // correctly handle PNG transparency in Win IE 5.5 and 6. 
{ 
if ((version >= 5.5) && (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 
var imgAttribs = img.attributes; 
for (var j=0; j<imgAttribs.length; j++) 
{ 
var imgAttrib = imgAttribs[j]; 
if (imgAttrib.nodeName == "align") 
{	
if (imgAttrib.nodeValue == "left") imgStyle = "float:left;" + imgStyle 
if (imgAttrib.nodeValue == "right") imgStyle = "float:right;" + imgStyle 
break 
} 
} 
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');\"" 
strNewHTML += " onmouseover=\"PNGswap('" + img.id + "');\" onmouseout=\"PNGswap('" + img.id 

+"');\"" 
strNewHTML += "></span>" 
img.outerHTML = strNewHTML 
i = i-1 
} 
} 
} 
} 
window.attachEvent("onload", correctPNG); 

function PNGswap(myID) 
{ 
var strOver = "_on" 
var strOff = "_off" 
var oSpan = document.getElementById(myID) 
var currentAlphaImg = oSpan.filters(0).src 
if (currentAlphaImg.indexOf(strOver) != -1) 
oSpan.filters(0).src = currentAlphaImg.replace(strOver,strOff) 
else 
oSpan.filters(0).src = currentAlphaImg.replace(strOff,strOver) 
}