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
<form>
5
Email: <input type="text" id="email" name="email" />
6
</form>
7
​
8
<p>The name of the text field is:
9
<script type="text/javascript">
10
x=document.getElementById('email');
11
document.write(x.name);
12
</script></p>
13
​
14
</body>
15
</html>
16
​