左面自适应，右面固定200px；
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>混合布局编程挑战</title>
<style type="text/css">
body{ margin:0; padding:0; font-size:30px; color:#fff}
.l{margin-left:-200px; height:500px; background:blue; position:absolute;width:100%;}
.left{ margin-left:200px; }
.right1{ width:200px;height:500px; background:#9C9; float:right;}
</style>
</head>
<body>
<div>
<div class="l"><div class="left">left</div></div>
<div class="right">right</div>
</div>
</body>
</html>左面固定右面自适应
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>混合布局编程挑战</title>
<style type="text/css">
body{ margin:0; padding:0; font-size:30px; color:#fff}
.top{height:100px; background:#ccc}
.left{ width:200px; height:500px; background:blue; float:left;}
.right{ margin-left:210px;height:500px; background:#9C9;position:absolute;width:100%;}
.foot{ height:50px; background:#F63;clear:both; }
</style>
</head>
<body>
<div class="top">top</div>
<div class="main">
<div class="right">right</div>
<div class="left">left</div>
</div>
<div class="foot">foot</div>
</body>
</html>