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";
}