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
<input type="button" id="button1"
5
name="button1" value="Click Me!" />
6
​
7
<p>The text on the button is:
8
<script type="text/javascript">
9
x=document.getElementById('button1');
10
document.write(x.value);
11
</script></p>
12
​
13
</body>
14
</html>
15
​