function isIE(){
if (navigator.appName!="Microsoft Internet Explorer") {return false}
return true
}

function redrawPNG() 
{
   for(var i=0; i<document.images.length; i++)
   {
	  var tarimg = document.images[i]
	  var iw=tarimg.width
	  var ih=tarimg.height
	  var tarimgsrc = tarimg.src.toUpperCase()
	  if (tarimgsrc.substring(tarimgsrc.length-3, tarimgsrc.length) == "PNG")
	  { 
         tarimg.style.filter+="progid:DXImageTransform.Microsoft.AlphaImageLoader(src="+tarimg.src+", sizingmethod=scale);" 
         tarimg.src="Scripts/clear.gif"
         tarimg.width=iw
         tarimg.height=ih
	  }
   }
}
if (isIE()) {window.attachEvent("onload", redrawPNG);}