问IE6 PNG透明度

EN

<script type="text/javascript">
    function fixPngs(){
    // Loops through all img tags   
        for (i = 0; i < document.images.length; i++){
            var s = document.images[i].src;
            if (s.indexOf('.png') > 0)  // Checks for the .png extension
                fixPng(s, document.images[i]);
        }
    }

    function fixPng(u, o){
        // u = url of the image
        // o = image object 
        o.src = 'images/spacer.gif';  // Need to give it an image so we don't get the red x
        o.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + u + "', sizingMethod='scale')";
    }   
</script>

<!--[if lte IE 6]>
    <script language="javascript" type="text/javascript">
        //this is a conditional comment that only IE understands. If a user using IE 6 or lower 
         //views this page, the following code will run. Otherwise, it will appear commented out.
        //it goes after the body tag so it can fire after the page loads.
        fixPngs();
    </script> 
<![endif]-->

img {
   behavior: url("pngbehavior.htc");
}

<!--[if IE 6]> 
  <link rel="stylesheet" type="text/css" href="ie6.css" />
<![endif]-->