//png图片透明
function fixPNG(myImage) {
    var arVersion = navigator.appVersion.split("MSIE");
    var version = parseFloat(arVersion[1]);
    if ((version >= 5.5) && (version < 7) && (document.body.filters)) {
        var imgID = (myImage.id) ? "id='" + myImage.id + "' " : "";
        var imgClass = (myImage.className) ? "class='" + myImage.className + "' " : "";
        var imgTitle = (myImage.title) ? "title='" + myImage.title + "' " : "title='" + myImage.alt + "' ";
        var imgStyle = "display:inline-block;" + myImage.style.cssText;
        var strNewHTML = "<span " + imgID + imgClass + imgTitle
        + " style=\"" + "width:" + myImage.width
        + "px; height:" + myImage.height
        + "px;" + imgStyle + ";"
        + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
        + "(src=\'" + myImage.src + "\', sizingMethod='scale');\"></span>";
        myImage.outerHTML = strNewHTML;
    }
}