案例：javascript案例     状态：可编辑再运行    进入竖版
 运行结果　
​x
 
1
<html>
2
<head>
3
<meta name="keywords" content="HTML, DHTML, CSS, XHTML, JavaScript" />
4
</head>
5
<body>
6
​
7
<script type="text/javascript">
8
x=document.getElementsByTagName("meta")[0];
9
document.write("Meta name: " + x.name);
10
</script>
11
​
12
</body>
13
</html>
14
​