使用Js来让IE支持png图片透明效果

var arVersion = navigator.appVersion.split("MSIE")
var version = parseFloat(arVersion[1])

function fixPNG(myImage)

{
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
}
}

<!--[if lt IE 7]>
<script defer type="text/javascript" src="pngfix.js"></script>
<![endif]-->

<img src="xyz.png" alt="foo" width="10" height="20" onload="fixPNG(this)">