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 && Number(rslt[1]) < 7.0);
        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('/assets/images/x.gif')";
                        }
                }
        }
}