DOM用TagName操作标签

 1 <!DOCTYPE html>
 2 <html xmlns="http://www.w3.org/1999/xhtml">
 3 <head>
 4     <title>通过ID获取值</title>
 5   
 6     <script type="text/javascript">
 7         function intevent()
 8         {
 9             //这个初始化是为每一个input的按钮加入了onclick事件
10             var inputs = document.getElementsByTagName("input");
11             for(var i=0;i<inputs.length;i++)
12             {
13                 var input = inputs[i];
14                 input.onclick = btnclick;
15                
16             }
17         }
18         function btnclick()
19         {
20             var inputs = document.getElementsByTagName("input");
21             for (var i = 0; i < inputs.length; i++) {
22                 var input = inputs[i];
23                 if(input==window.event.srcElement)
24                 {
25                     input.value = "呜呜";
26                 }
27 
28                 else
29                 {
30                     input.value = 'laugh';
31                 }
32 
33             }
34         }
35     </script>
36 </head>
37 <body onload="intevent()">
38     <input type="button" value="laugh" />
39     <input type="button" value="laugh" />
40     <input type="button" value="laugh" />
41     <input type="button" value="laugh" />
42     <input type="button" value="laugh" />
43     <input type="button" value="laugh" />
44 </body>
45 </html>