function addPngFilter(element) {
	element.style.filter=
		"progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+element.src+"',sizingMethod='scale');";
	element.src = 'pngfilter/blank.gif';
	return 
}

function pngOnload() {
	if((!navigator) || (!navigator.appVersion)) {
		appVersion = 0; 
	} else {
		appVersion = navigator.appVersion.match(/MSIE (\d\.\d)/);
		if(typeof appVersion == 'array') appVersion = appVersion[1];
	}
	if (appVersion < 5.5) return; // IE5.0 not supported
	for(var i=0; i<document.images.length; i++) {
		if(document.images[i].src.indexOf(".png") > 0) addPngFilter(document.images[i]);
		}
}