为什么输入的文字的main不能被right子元素占满高度,必须要删除main文本才能恢复
<!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:36px;
color:#3F0;}
.top{
height:100px;
background:#F00;}
.main{
height:300px;;}
.left{
width:200px;
height:300px;
background:#FF0;
position:absolute;
left:0;
top:100px;
}
.right{
margin-left:210px;
height:300px;
background:#0FF;}
.foot{
height:100px;
background:#00F;}
</style>
</head>
<body>
<div class="top">top</div>
<div class="main">main
<div class="right">right</div>
<div class="left">left</div>
</div>
<div class="foot">foot</div>
</body>
</html>
