if (navigator.platform == "Win32" && navigator.appName == "Microsoft Internet Explorer" && window.attachEvent) {
 document.writeln('<style type="text/css">img, input.image { visibility:hidden; } </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) {
   fnFixPng(img);
   img.attachEvent("onpropertychange", fnPropertyChanged);
  }
  img.style.visibility = "visible";
 }
 
 var nl = document.getElementsByTagName("INPUT");
 for (var i = nl.length - 1, e = null; (e = nl[i]); i--) {
  if (e.className && e.className.match(/\bimage\b/i) != null) {
   if (e.src.match(/\.png$/i) != null) {
    fnFixPng(e);
    e.attachEvent("onpropertychange", fnPropertyChanged);
   }
   e.style.visibility = "visible";
  }
 }
}
 
function fnPropertyChanged() {
 if (window.event.propertyName == "src") {
  var el = window.event.srcElement;
  if (!el.src.match(/x\.gif$/i)) {
   el.filters.item(0).src = el.src;
   el.src = "x.gif";
  }
 }
}
 
function dbg(o) {
 var s = "";
 var i = 0;
 for (var p in o) {
  s += p + ": " + o[p] + "\n";
  if (++i % 10 == 0) {
   alert(s);
   s = "";
  }
 }
 alert(s);
}
 
function fnFixPng(img) {
 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 = "x.gif";
}