效果
<html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>半透明div</title> <style> #div1 { margin:0px auto; width:500px; height:370px ; text-align:center; background:url('http://www.codefans.net/jscss/demoimg/wall3.jpg');} #div2 { height:330px; filter:alpha(Opacity=80);-moz-opacity:0.5;opacity: 0.5;z-index:100; background-color:#ffffff; } </style> </head> <body> <div id="div1"> <div style="padding:20px;"> <div id="div2">这里是透明的DIV</div> </div> </div> </body> </html>