使得ie6 png 格式图片正常显示代码

<!--使得ie6png正常显示代码开始-->
<script language="JavaScript">
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-1, 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>
<!--使得ie6png正常显示代码结束-->