var clear = "img/clear.gif" //path to clear.gif

pngfix = function() {
    var els = document.getElementsByTagName('*'); var ip = /\.png/i; var i = els.length; while (i-- > 0) {
        var el = els[i];
        var es = el.style;
        if (el.src && el.src.match(ip) && !es.filter) { es.height = el.height; es.width = el.width; es.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + el.src + "',sizingMethod='crop')"; el.src = clear; }
        else {
            var elb = el.currentStyle.backgroundImage; if (elb.match(ip)) {
                var path = elb.split('"');
                var rep = (el.currentStyle.backgroundRepeat == 'no-repeat') ? 'crop' : 'scale'; es.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + path[1] + "',sizingMethod='" + rep + "')"; es.height = el.clientHeight + 'px'; es.backgroundImage = 'none';
                var elkids = el.getElementsByTagName('*'); if (elkids) {
                    var j = elkids.length; if (el.currentStyle.position != "absolute") es.position = 'static';
                    while (j-- > 0) if (!elkids[j].style.position) elkids[j].style.position = "relative";
                } 
            }
        }
    }
}
window.attachEvent('onload', pngfix);