IE6浏览器下去除PNG透明背景的JS代码

本文关键字: IE6, PNG, 背景

在IE6浏览器下 PNG图片的透明背景会显示灰色阴影 如何去除PNG图片背景，下面是经过测试过的代码，可以去除PNG图片背景。

<script type=”text/javascript” language=”JavaScript”>// <![CDATA[

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);
// ]]></script>