if (navigator.platform == "Win32" && navigator.appName == "Microsoft Internet Explorer" && window.attachEvent) {
        window.attachEvent("onload", alphaBackgrounds);
}
 
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 (itsAllGood && bg){
                       if (bg.match(/\.png/i) != null){
                               var mypng = bg.substring(5,bg.length-2);
                               document.all[i].style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+mypng+"', sizingMethod='scale')";
                               document.all[i].style.backgroundImage = "url('../images/blank.gif')";
                       }
               }
        }
}