function transparent(im)
   {
   if (!im.transparented && (/\.png/.test(im.src)))
	  {
	  im.transparented = 1;
	  var picture = im.src;
	  var w = im.width;
	  var h = im.height;
	  im.src = "images/spacer.gif";
	  im.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, sizingMethod='scale', src='" + picture + "');";
	  im.width = w;
	  im.height = h;
	  }
   return "transparent";
   }