<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<meta name="description" content="this" />
<meta name="keywords" content="this" />
<title>this</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.1/jquery.min.js"></script>
<style type="text/css">
body{margin:0;padding:0;}
.hover{float:left;position:relative;margin:0 auto;padding:0; }
.hv{position:absolute; left:0;top:0;display:none; }
</style>
<script type="text/javascript">
$(function() {
$('.hover').hover(
function (){
$('.hv').stop().fadeTo('slow',1);
},function() {
$('.hv').stop().fadeTo('slow',0);
}
)
})
</script>
</head>
<body>
<div class="hover">
<img src="http://img.vip.xunlei.com/img/banner/201303181424386268.jpg" alt="" width='100px' height='100px'>
<img class="hv" src="http://www.baidu.com/img/shouye_b5486898c692066bd2cbaeda86d74448.gif" alt="" width='100px' height='100px'>
</div>
</body>
</html>