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>
原文：http://www.cnblogs.com/a2762/p/4076616.html