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// 页面直接插入PNG图片透明//
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function correctPNG() // correctly handle PNG transparency in Win IE 5.5 & 6.

{

    var arVersion = navigator.appVersion.split("MSIE")

    var version = parseFloat(arVersion[1])

    if ((version >= 5.5) && (document.body.filters))

    {

       for(var j=0; j<document.images.length; j++)

       {

          var img = document.images[j]

          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

             j = j-1

          }

       }

    }    

}

window.attachEvent("onload", correctPNG);