// ------------------------------------------------------------------
// *** This function handles PNG transparency for IE 5.5 and higher.
// *** It does this by finding each PNG image on the page and adding
// *** the AlphaImageLoader filter to each one.
// ------------------------------------------------------------------

function fixPNG() {
    if (navigator.appName == "Microsoft Internet Explorer") {
        for (var i=0; i<document.images.length; i++) {
            var img = document.images[i]
            var imgName = img.src.toUpperCase()
            if (imgName.substring(imgName.length-3, imgName.length) == "PNG") {
                var imgID = (img.id) ? "id='" + img.id + "' " : ""
                var imgClass = (img.className) ? "class='" + img.className + "' " : ""
                var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' "
                var imgStyle = "display:inline-block;" + img.style.cssText 
                if (img.align == "left") imgStyle = "float:left;" + imgStyle
                if (img.align == "right") imgStyle = "float:right;" + imgStyle
                if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle       
                var strNewHTML = "<span " + imgID + imgClass + imgTitle
                + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
                + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
                + "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>" 
                img.outerHTML = strNewHTML
                i = i-1
            }
        }
    }
}

function swapPNG(id, newpng) {
    if (navigator.appName == "Microsoft Internet Explorer") {
        var img = document.getElementById(id);
        var imgStyle = img.style.cssText;
        ix = imgStyle.indexOf("src=");
        sx = imgStyle.substring(0, ix+5);
        iy = imgStyle.indexOf("', sizing");
        sy = imgStyle.substring(iy);
        img.style.cssText = sx + newpng + sy;
    }
}

if (navigator.appName == "Microsoft Internet Explorer") {
    window.attachEvent("onload", fixPNG);
}