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
<body>
3
​
4
<p><a id="myAnchor" rel="index" href="//www.w3xue.com">Visit W3xue.com</a></p>
5
​
6
<script type="text/javascript">
7
x=document.getElementById("myAnchor");
8
document.write(x.rel);
9
</script>
10
​
11
</body>
12
</html>