PNG图片在IE6中非正常显示的处理方法

<!--[if IE 6]><script type="text/javascript" src="http://cdc.tencent.com/wp-content/themes/cdcblog2/js/png24.js" ></script><script type="text/javascript">DD_belatedPNG.fix('#top,a#logo,a#logo:hover,#menu li a:hove,#menu li#on a,#menu li#rss,#menu li a.rss,#menu li a.rss:hover,#menu li a.feed,#menu li a.feed:hover');</script><![endif]-->