看示例吧: <br>body{ <br>margin:0; <br>padding:30px 0 0 0; <br>} <br>div#menu{ <br>position:absolute; top:0; <br>left:0; <br>width:100%; <br>height:30px; <br>background-color:#ddd; <br>} <br>@media screen{ <br>body>div#menu{ <br>position:fixed; <br>} <br>} <br>* html body{ <br>overflow:hidden; <br>} <br>* html div#content{ <br>height:100%; <br>overflow:auto; <br>} <br> HTML示例: <!-- quirksmode --> <title>Demo</title> <link href="fixed.css" rel="stylesheet" type="text/css"> <div id="menu"> Mozilla Opera Netscape Firefox IE6 Windows Style CSS </div> <div id="content"> 只要内容大于一屏的高度就行 </div> [Ctrl+A 全选 注:如需引入外部Js需刷新才能执行] 你删除第一行注释看看效果如何?
