仿百度首页选项卡切换效果

效果：
http://hovertree.com/texiao/jquery/71/

代码如下：

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jQuery仿百度首页选项卡切换效果 - 何问起</title>
<base target="_blank" />
<style type="text/css">
body {
background: url(http://hovertree.com/texiao/jquery/71/images/65.jpg) no-repeat fixed center center;
}

.hovertreepage .clear {
clear: both;
}

.hovertreepage {
margin: 200px auto 0 auto;
width: 700px;
height: 300px;
}

.hovertreepage .left, .hovertreepage .right {
float: left;
}

.hovertreepage .nav-back {
width: 60px;
height: 300px;
background: #000;
opacity: .3;
filter: alpha(opacity=30);
}

.hovertreepage .nav {
position: relative;
margin-top: -300px;
width: 60px;
text-align: center;
font-size: 14px;
font-family: "微软雅黑";
color: #fff;
}

.hovertreepage .nav div {
height: 32px;
line-height: 28px;
cursor:pointer;
}

.hovertreepage .nav div.on {
background: #0094ea;
}

.hovertreepage .right {
width: 620px;
height: 300px;
margin-left: 20px;
}

.hovertreepage .content-back {
width: 620px;
height: 300px;
background: #fff;
opacity: .3;
}

.hovertreepage .content {
position: relative;
width: 600px;
height: 280px;
margin-top: -300px;
padding: 10px;
overflow: hidden;
}
.hovertreepage .content a{color:blue;}

.hovertreepage .content div {
width: 600px;
height: 280px;
margin-bottom: 10px;
background: #fff;
}
</style>

</head>
<body>

<div class="hovertreepage">
<div class="left">
<div class="nav-back"></div>
<div class="nav">
<div class="on">导航</div>
<div>新闻</div>
<div>世界杯</div>
<div>音乐</div>
<div>彩票</div>
</div>
</div>
<div class="right">
<div class="content-back"></div>
<div class="content">
<div>1 <a href="http://hovertree.com">首页</a> <a href="http://hovertree.com/texiao/">特效</a> <a href="http://hovertree.com/h/bjaf/n781jmfy.htm">原文</a>
</div>
<div>2 </div>
<div>3 <a href="http://hovertree.com/texiao/jquery/70/color.htm">服装店风云</a> 自从接触编程以后，兴趣就一直有增无减。</div>
<div>4 <a href="http://hovertree.com/h/bjaf/ati6k7yk.htm">jQuery全部版本下载</a>
时间就是金钱，效率就是生命。
</div>
<div>5 <a href="http://hovertree.com/texiao/html5/30/"><img src="http://hovertree.com/hvtimg/bjafjd/wmt3mxd7.png" alt="孙悟空" /></a></div>
</div>
</div>
<div class="clear"></div>
</div>

<script type="text/javascript" src="http://down.hovertree.com/jquery/jquery-1.12.3.min.js"></script>
<script type="text/javascript">
$(".hovertreepage .nav div").mouseenter(function () {
var $this = $(this);
var index = $this.index();
}).mouseleave(function () {
var $this = $(this);
var index = $this.index();
}).click(function () {
var $this = $(this);
var index = $this.index();
var l = -(index * 290);
$(".hove"+"rtreepage .nav div").removeClass("on");
$(".hovertreepage .nav div").eq(index).addClass("on");
$(".hovertreepage .content div:eq(0)").stop().animate({ "margin-top": l }, 500);
});
</script>

</body>
</html>