<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<style type="text/css">
*{
margin: 0;
padding: 0;
}
body{
background-color: #000;
}
.box{
800px;
height: 42px;
margin: 100px auto;
background: url(images/rss.png) no-repeat right center #fff;
border-radius: 5px;
position: relative;
z-index: 0;
}
.box ul{
list-style: none;
position: relative;
}
.box ul li{
float: left;
83px;
height: 42px;
font-size: 14px;
line-height: 42px;
text-align: center;
cursor: pointer;
}
.box .bg{
83px;
height: 42px;
background: url(images/cloud.gif) no-repeat;
position: absolute;
left: 0px;
top: 0px;
z-index: -1;
}
</style>
<script type="text/javascript">
function $(id){
return document.getElementById(id);
}
window.onload = function(){
var leader = 0;
var target = 0;
var current = 0;
setInterval(function(){
leader = leader + (target - leader) / 10;
$('logo').style.left = leader + 'px';
}, 10);
var lis = $('nav').getElementsByTagName('li');
for (var i = 0; i < lis.length; i++) {
lis[i].onmouseover = function(){
//计算出当前li的位置
target = this.offsetLeft;
};
lis[i].onmouseout = function(){
//计算出当前li的位置
target = current;
};
lis[i].onclick = function(){
//计算出当前li的位置
current = this.offsetLeft;
}
}
}
</script>
</head>
<body>
<div class="box" id = "nav">
<ul>
<li>新闻模块</li>
<li>体育模块</li>
<li>财经模块</li>
<li>汽车模块</li>
<li>天气模块</li>
<li>国内新闻</li>
<li>国内新闻</li>
<li>国内新闻</li>
</ul>
<span class="bg" id="logo"></span>
</div>
</body>
</html>
