<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
.tab{
width: 500px;
height: 300px;
border: 1px solid red;
margin: 0 auto;
overflow: hidden;
position: relative;
}
*{
margin: 0;
padding: 0;
}
ul{
transition: 1s;
}
ul,ol{
list-style: none;
}
a{
text-decoration: none;
}
ul li{
width: 500px;
height: 300px;
text-align: center;
line-height: 300px;
color: white;
font-size: 100px;
}
ol .active{
background:black;
}
ul li:nth-child(1){
background: red;
}
ul li:nth-child(2){
background:yellow;
}
ul li:nth-child(3){
background:green;
}
ol{
position: absolute;
width: 100px;
height: 30px;
/*background: black;*/
bottom: 20px;
left: 50%;
margin-left: -50px;
}
ol li{
float: left;
background: #ccc;
width: 30px;
height: 30px;
border-radius: 50%;
margin-right: 3px;
font-size: 15px;
color: white;
text-align: center;
line-height: 30px;
}
</style>
</head>
<body>
<div class="tab" id="tab1">
<ul>
<li>1</li>
<li>2</li>
<li>3</li>
</ul>
<ol>
<li class="active">1</li>
<li>2</li>
<li>3</li>
</ol>
</div>
<div class="tab" id="tab2">
<ul>
<li>1</li>
<li>2</li>
<li>3</li>
</ul>
<ol>
<li class="active">1</li>
<li>2</li>
<li>3</li>
</ol>
</div>
</body>
<script>
function $s(x){
return document.querySelectorAll(x);
}
function $(x){
return document.querySelector(x);
}
function tab(id){
var btns=$s(id+" ol li");
var picbox=$(id+" ul");
var length=btns.length;
for(i=0;i<length;i++){
btns[i].index=i;
btns[i].onclick=function(){
for(i=0;i<length;i++){
btns[i].className="";
}
picbox.style.marginTop=-300*this.index+"px";
btns[this.index].className="active";
}
}
}
tab("#tab1");
tab("#tab2");
</script>
</html>
原文：http://www.cnblogs.com/wangyalijas/p/5812313.html