var clear = "img/spacer.gif" //Path to transparent 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);