if (navigator.platform == "Win32" && navigator.appName == "Microsoft Internet Explorer" && window.attachEvent) {
 //document.writeln('<style type="text/css">img { visibility:hidden;border:0; } </style>');
 window.attachEvent("onload", fnLoadPngs);
}
function fnLoadPngs() {
 var rslt = navigator.appVersion.match(/MSIE (\d+\.\d+)/, '');
 var itsAllGood = (rslt != null && Number(rslt[1]) >= 5.5);

 for (var i = document.images.length - 1, img = null; (img = document.images[i]); i--) {
  if (itsAllGood && img.src.match(/\.png$/i) != null) {
   var src = img.src;
   img.style.width = img.width + "px";
   img.style.height = img.height + "px";
   img.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + src + "', sizingMethod='scale')"
   img.src = "images/pngblank.gif";
  }
  img.style.visibility = "visible";
 }
}