定义三个按钮
点击按钮，出现A、B、C、D字母，点击一下，出现一个
当按钮字母为 D 的时候，继续点击又会重新回到 A
1 <!DOCTYPE HTML>
2 <html>
3 <head>
4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
5 <title>无标题文档</title>
6 <script>
7 window.onload = function (){
8 var aBtn = document.getElementsByTagName(‘input‘);
9 var arr = [ ‘A‘, ‘B‘, ‘C‘, ‘D‘ ];
10
11 for( var i=0; i<aBtn.length; i++ ){
12
13 aBtn[i].num = 0;
14
15 aBtn[i].onclick = function (){
16 // alert( arr[ this.num ] );
17 this.value = arr[ this.num ];
18
19 this.num++;
20 if( this.num === arr.length ){
21 this.num = 0;
22 }
23 };
24 }
25 };
26 </script>
27 </head>
28
29 <body>
30
31 <input type="button" value="0" />
32 <input type="button" value="0" />
33 <input type="button" value="0" />
34
35 </body>
36 </html>
示例代码
时间： 2024-10-10 05:57:38