用CSS在IE中显示透明PNG图像

IE的IMG标签一直显示不了PNG图像的透明背景，前几天在蓝色理想看到一个解决的方法：使用AlphaImageLoader和Alpha滤镜通过CSS的方法显示透明的PNG图片

<html>
<head>
<title>alpha image</title>
<style type="text/css">
.pngholder{
width:100px;
height:100px;
filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='http://www.misuisui.com/weblog/attachments/200510/03_124401_ie.png');
}
.pngalpha{
filter:progid:DXImageTransform.Microsoft.Alpha(opacity=0);
background:url(http://www.misuisui.com/weblog/attachments/200510/03_124401_ie.png) no-repeat;
width:100px;
height:100px;
}
</style>
</head>
<body bgcolor="#3399ff#">
<!- And this is your code to implement the image ->
<div>透明</div>
<div class="pngholder"><div class="pngalpha"></div></div>
<div>不透明</div>
<img src="http://www.misuisui.com/weblog/attachments/200510/03_124401_ie.png"/>
</body>
</html>