//png filter
function setPng(obj) {
	if (navigator.appName == "Microsoft Internet Explorer") { 
	var sVer = window.navigator.userAgent; 
	var msie = sVer.indexOf("MSIE "); 
		if (msie > 0) { 
		  var verNum = parseFloat(sVer.substring(msie+5, sVer.indexOf(";", msie))); 
		} 
	}
	if (verNum<7) {
	obj.width=obj.height=1;
	obj.className=obj.className.replace(/\bpng\b/i,'');
	obj.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+ obj.src +"',sizingMethod='image');"
	obj.src=''; 
	return '';
	}
}