做Web开发的朋友一定都知道PNG是一个相当不错的图片格式，但是这个好的格式却在IE6时代造成了麻烦，IE6会使透明的PNG的透明部分出现#DBEAED的色彩。透明不了。使得在FF下开发表现很好的界面换成IE浏览就惨不忍睹，又逼着换成GIF，而GIF的假透明在变换背景时造成毛边现象。

 刚去了www.gowindowslive.com去生成一个WLM的联系方式图标，结果发现的官方的解决方案。;)

核心函数贴出来供分析

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/* 
Correctly handle PNG transparency in Win IE 5.5 & 6. 
Copyright 2007 Ignia, LLC 
Based in part on code from from http://homepage.ntlworld.com/bobosola. 
 
Use in  with DEFER keyword wrapped in conditional comments: 
 
<script type="text/javascript" defer="true" src="pngfix.js"></script> 
 
*/ 
 
function fixPng() { 
  var arVersion = navigator.appVersion.split("MSIE") 
  var version = parseFloat(arVersion[1]) 
 
  if ((version &gt;= 5.5 &amp;&amp; version &lt; 7.0) &amp;&amp; (document.body.filters)) { 
    for(var i=0; i<document.images.length;></document.images.length;>      var img = document.images[i]; 
      var imgName = img.src.toUpperCase(); 
      if (imgName.indexOf(".PNG") &gt; 0) { 
        var width = img.width; 
        var height = img.height; 
        var sizingMethod = (img.className.toLowerCase().indexOf("scale") &gt;= 0)? "scale" : "image"; 
        img.runtimeStyle.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + img.src.replace('%23', '%2523').replace("'", "%27") + "', sizingMethod='" + sizingMethod + "')"; 
        img.src="images/blank.gif" mce_src="images/blank.gif"; 
        img.width = width; 
        img.height = height; 
        } 
      } 
    } 
  } 
 
fixPng();

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