为什么left div去了top:100px;这一句 就在下面了呢 left不是main的子div吗 为什么不在main里面
<!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-color:#ccc;}
.main{background-color:red;height:300px;}
.right{background-color:#d57;margin-left:210px;height:300px;}
.left{ width:200px;height:300px;background-color:blue;position:absolute;left:0;top:100px;}
.foot{height:100px;background-color:#234;}
</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>
