数组接力棒

点击一次按钮,数组的第一项跑到最后,然后删除第一项
 1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
 2 "http://www.w3.org/TR/html4/strict.dtd">
 3 
 4 <html xmlns="http://www.w3.org/1999/xhtml" lang="en">
 5     <head>
 6         <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 7         <title>1.数组接力棒</title>
 8         <meta name="author" content="Administrator" />
 9         <!-- Date: 2014-12-16 -->
10         <script>
11             window.onload=function(){
12                 var oInput=document.getElementsByTagName('input')[0];
13                 var oDiv1=document.getElementById('div1');
14                 var arr=[];
15                 arr=oDiv1.innerHTML.split(',');
16                 oInput.onclick=function(){
17                     arr.push(arr[0]);
18                     arr.shift(arr[0]);
19                     oDiv1.innerHTML=arr//可以直接这样用,也可以用arr.join(',')
20                 }
21             }
22         </script>
23     </head>
24     <body>
25         <input type="button" value="点击">
26         <div id="div1">1,2,3,4</div>
27     </body>
28 </html>