1 function tab(pid){
2 var ps =['mli','news','people','tech'];
3
4 for(var i=0 ,len = ps.length;i<len;i++){
5 if(ps[i] == pid){
6 document.getElementById(ps[i]).style.display ='block';
7 }else{
8 document.getElementById(ps[i]).style.display ='none';
9 }
10 }
11 }
12 <body>
13 <div>
14 <ul>
15 <li onmouseover="tab('mli');">军事</li>
16 <li onmouseover="tab('news');">新闻</li>
17 <li onmouseover="tab('people');">人物</li>
18 <li onmouseover="tab('tech');">科技</li>
19 </ul>
20 <p id="mli">军事频道</p>
21 <p id="news">新闻频道</p>
22 <p id="people">人物频道</p>
23 <p id="tech">科技频道</p>
24 </div>
25 </body>
