javascript脚本 设置PNG在IE6下透明

/* IE6PNG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;    }}