IE6实现PNG图片透明

#mailDiv {
    height: 128px;
    width: 128px;
    padding: 0px;
    background-repeat: repeat;
}

html>body #mailDiv {
    background-repeat: repeat;background-image: url(mail.png);
}

* #mailDiv {
    filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, sizingMethod=scale, src="mail.png")

} 

 

参考：http://www.cnblogs.com/yeer/archive/2009/04/27/1444686.html