if ((navigator.platform == "Win32") && (navigator.appName == "Microsoft Internet Explorer") && (window.attachEvent)) {
    document.writeln('<style type="text/css">img { 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) {
            var src = img.src;
            img.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+src+"', sizingMethod='scale')"
            img.src = "images/spacer.png";
        }
        img.style.visibility = "visible";
    }
}