var ie = document.all && document.fireEvent && navigator.platform == "Win32";

if (ie) {
  window.attachEvent("onload", pngfix);
}

function pngfix() {
  if (ie) {
    var i, a, f;
    for(i=0; (a = document.getElementsByTagName("img")[i]); i++) {
      if (a.className=="pnga") {
        f = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+a.src+"')";
        a.src = "/images/e.png";
        a.style.filter = f;
      }
    }
  }
}