1 <style>
2 *{margin:0;padding:0;}
3 body{font-size:14px;font-family:"Microsoft YaHei";}
4 ul,li{list-style:none;}
5 #tab{position:relative;}
6 #tab .tabList ul li{
7 float:left;
8 background:#fefefe;
9 background:-moz-linear-gradient(top, #fefefe, #ededed);
10 background:-o-linear-gradient(left top,left bottom, from(#fefefe), to(#ededed));
11 background:-webkit-gradient(linear,left top,left bottom, from(#fefefe), to(#ededed));
12 border:1px solid #ccc;
13 padding:5px 0;
14 width:100px;
15 text-align:center;
16 margin-left:-1px;
17 position:relative;
18 cursor:pointer;
19 }
20 #tab .tabCon{
21 position:absolute;
22 left:-1px;
23 top:32px;
24 border:1px solid #ccc;
25 border-top:none;
26 width:403px;
27 height:100px;
28 }
29 #tab .tabCon div{
30 padding:10px;
31 position:absolute;
32 opacity:0;
33 filter:alpha(opacity=0);
34 }
35 #tab .tabList li.cur{
36 border-bottom:none;
37 background:#fff;
38 }
39 #tab .tabCon div.cur{
40 opacity:1;
41 filter:alpha(opacity=100);
42 }
43 </style>
44 </head>
45 <body>
46
47 <div id="tab" style="margin-left:460px;margin-top:20px">
48 <div class="tabList">
49 <ul>
50 <li class="cur">许嵩</li>
51 <li>周杰伦</li>
52 <li>林俊杰</li>
53 <li>陈奕迅</li>
54 </ul>
55 </div>
56 <div class="tabCon">
57 <div class="cur">断桥残雪、千百度、幻听、想象之中</div>
58 <div>红尘客栈、牛仔很忙、给我一首歌的时间、听妈妈的话</div>
59 <div>被风吹过的夏天、江南、一千年以后</div>
60 <div>十年、K歌之王、浮夸</div>
61 </div>
62 </div>
63
64 <script>
65 window.onload = function() {
66 var oDiv = document.getElementById("tab");
67 var oLi = oDiv.getElementsByTagName("div")[0].getElementsByTagName("li");
68 var aCon = oDiv.getElementsByTagName("div")[1].getElementsByTagName("div");
69 var timer = null;
70 for (var i = 0; i < oLi.length; i++) {
71 oLi[i].index = i;
72 oLi[i].onmouseover = function() {
73 show(this.index);
74 }
75 }
76 function show(a) {
77 index = a;
78 var alpha = 0;
79 for (var j = 0; j < oLi.length; j++) {
80 oLi[j].className = "";
81 aCon[j].className = "";
82 aCon[j].style.opacity = 0;
83 aCon[j].style.filter = "alpha(opacity=0)";
84 }
85 oLi[index].className = "cur";
86 clearInterval(timer);
87 timer = setInterval(function() {
88 alpha += 2;
89 alpha > 100 && (alpha = 100);
90 aCon[index].style.opacity = alpha / 100;
91 aCon[index].style.filter = "alpha(opacity=" + alpha + ")";
92 alpha == 100 && clearInterval(timer);
93 },
94 5)
95 }
96 }
97 </script>
![](https://images2015.cnblogs.com/blog/1156842/201705/1156842-20170502201309664-855106367.png)