var PIXELGIF = "image/transparent.gif"; // 这个是个头1*1像素的透明gif图片，请自行建立并放在你网页的相同目录下

var arVersion = navigator.appVersion.split("MSIE");
var version = parseFloat(arVersion[1]);
var pngxp = /\.png$/i;
var AlphaPNGfix = "progid:DXImageTransform.Microsoft.AlphaImageLoader";
function fixPNGAll() {
    if (!document.all) return;
    if ((version >= 5.5 && version < 7) && (document.body.filters)) {
        for (var i = 0; i < document.images.length; i++) {
            var img = document.images[i];
            if (img.src && pngxp.test(img.src)) {
                var imgName = img.src;
                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:" + AlphaPNGfix
                  + "(src='" + img.src + "', sizingMethod='scale');\"></span>";
                if (img.useMap) {
                    strNewHTML += "<img style=\"position:relative; left:-" + img.width + "px;"
                        + "height:" + img.height + "px;width:" + img.width + "\" "
                        + "src=\"" + PIXELGIF + "\" usemap=\"" + img.useMap
                        + "\" border=\"" + img.border + "\">";
                }
                img.outerHTML = strNewHTML;
                i--;
            }
        }
        /* for type=image png button */
        var kmax = document.forms.length;
        for (var k = 0; k < kmax; k++) {
            var fmob = document.forms[k];
            var elmarr = fmob.getElementsByTagName("input");
            var jmax = elmarr.length;
            for (var j = 0; j < jmax; j++) {
                var elmob = elmarr[j];
                if (elmob && elmob.type == "image" && pngxp.test(elmob.src)) {
                    var origsrc = elmob.src;
                    elmob.src = PIXELGIF;
                    elmob.style.filter = AlphaPNGfix + "(src='" + origsrc + "')";
                }
            }
        }
    }
}

　



function fixPNG(img) {
    openwin();
    if (!document.all) return;
    var img;
    if (img && img.src && pngxp.test(img.src)) {
        var imgName = img.src;
        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:" + AlphaPNGfix
      + "(src='" + img.src + "', sizingMethod='scale');\"></span>";
        if (img.useMap) {
            strNewHTML += "<img style=\"position:relative; left:-" + img.width + "px;"
        + "height:" + img.height + "px;width:" + img.width + "\" "
        + "src=\"" + PIXELGIF + "\" usemap=\"" + img.useMap
        + "\" border=\"" + img.border + "\">";
        }
        img.outerHTML = strNewHTML;
    }
}