這節的這個問題到底怎么解決？
任務
任務1：完成頂部（top）、底部（foot）寬度自適應
任務2：中間分為2兩欄，其中，左側（left）寬度為200px， 右側（right）寬度自適應
任務3：要求右側（right）先加載，左側（left）后加載
任務4：編寫的代碼要兼容ie6
<!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>混合布局編程挑戰</title>
<style type="text/css">
body{ margin:0; padding:0; font-size:30px; color:#fff;}
.top{ height:100px;background:#ccc;}
.main{height:500px;}
.left{ width:200px; height:500px; background:blue; }
.right{ margin-left:210px;height:500px; background:#9C9;}
.foot{ height:50px;background:#f63;}
</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>
2016-04-12
<!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>混合布局編程挑戰</title>
<style type="text/css">
body{ margin:0; padding:0; font-size:30px; color:#fff}
.top{height:70px; background:gray;}
.main{height:420px; background:red;}
.left{ width:200px; height:420px; background:blue; float:left;}
.right{height:420px; background:green; float:right; padding-right:771px;}
.foot{height:35px; background:orange;}
</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>
寫完后點擊“全屏”觀察效果。