function alphaBackgrounds(){
   var rslt = navigator.appVersion.match(/MSIE (d+.d+)/, '');
   var itsAllGood = (rslt != null && Number(rslt[1]) >= 5.5);
   for (i=0; i<document.all.length; i++){
      var bg = document.all[i].currentStyle.backgroundImage;
      if (bg){
         if (bg.match(/.png/i) != null){
            var mypng = bg.substring(5,bg.length-2);
   //alert(mypng);
            document.all[i].style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+mypng+"', sizingMethod='crop')";
            document.all[i].style.backgroundImage = "url('')";
   //alert(document.all[i].style.filter);
         }                                              
      }
   }
}
if (navigator.platform == "Win32" && navigator.appName == "Microsoft Internet Explorer" && window.attachEvent) {
   window.attachEvent("onload", alphaBackgrounds);
}