var transparentImage = "img/spacer.gif";

pngfix = function() {
	var hEls = document.getElementsByTagName("img");
	for (var i=0, len=hEls.length; i<len; i++) {
		if (hEls[i].src.match(/\.png$/i) !== null){
			hEls[i].style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+hEls[i].src+"', sizingMethod='scale')";
			hEls[i].src = transparentImage;
		}
	}
}
if (window.attachEvent && navigator.userAgent.indexOf("Opera")==-1) window.attachEvent("onload", pngfix);