解决IE6下透明PNG图片有灰底的

 

<script language="javascript">
// 修复 IE 下 PNG 图片不能透明显示的问题
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;
} }

window.onload=function(){
         document.getElementById("top").style.height=screen.height/5+"px";
       
}//
</script>

用法如下：
<img src="logo.png" width="328" height="325" border="0" onload="fixPNG(this)" />

 

sogou  IE8 下测试成功~~