<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>左右布局（右侧定宽，左侧自适应宽）</title>
<style type="text/css">
body{font:12px arial;color:#000;background:#fff;margin:0}
#header{height:50px;color:#fff;background:#666;line-height:50px;margin-bottom:10px}
#content{100%;color:#fff;float:left;margin-right:-240px}
#content_inner{height:400px;background:#666;margin-right:240px}
#side{230px;height:400px;color:#fff;background:#666;float:right}
#footer{height:50px;color:#fff;background:#666;margin-top:10px}
.clear{clear:both}
</style>
</head>
<body>
<div id="header">顶部</div>
<div id="content">
<div id="content_inner">左侧</div>
</div>
<div id="side">右侧</div>
<div class="clear"></div>
<div id="footer">底部</div>
</body>
</html>
转自： http://blog.163.com/da7_1@126/blog/static/104072678201202763448110/