function PNG_loader() {		
	var navegador = navigator.appName;
	if (navegador == "Microsoft Internet Explorer"){	
	   for(var i=0; i<document.images.length; i++) {
	      var img = document.images[i];
	      var imgName = img.src.toUpperCase();
	      if (imgName.substring(imgName.length-3, imgName.length) == "PNG") {
	         var imgID = (img.id) ? "id='" + img.id + "' " : "";
	         var imgClass = (img.className) ? "class='" + img.className + "' " : "";
	         var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' ";
	         var imgStyle = "display:inline-block;" + img.style.cssText;
	         if (img.align == "left") imgStyle += "float:left;";
	         if (img.align == "right") imgStyle += "float:right;";
	         if (img.parentElement.href) imgStyle += "cursor:hand;";
	         var strNewHTML = "<span " + imgID + imgClass + imgTitle
	            + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
	            + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
	            + "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>";
	         img.outerHTML = strNewHTML;
	         i--;
	      }
	   }
	}  
}