function displayPNG(_url, _width, _height, _alt) {
	var isWinIE = false;
	var IEvers = 0;
	if (navigator.userAgent) {
		var index = navigator.userAgent.indexOf("MSIE");
		if (index != -1) {
			isWinIE = true;
			IEvers = parseFloat(navigator.userAgent.substring(index+5));
		}
	}
		
	if (isWinIE) {
		document.write('<img src="http://www.sitemason.com/images/trans.gif" width="'+_width+'" height="'+_height+'" border="0" alt="'+_alt+'" style="filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src=\''+_url+'\', sizingMethod=\'scale\')" />');
	} else {
		document.write('<img src="'+_url+'" width="'+_width+'" height="'+_height+'" border="0" alt="'+_alt+'" />');
	}
}