jQuery实现“返回顶部”
<head> <title>jQuery实现“返回顶部”（固定DIV） - 计划 - 博客园</title>
<meta name="keywords" content="www.cnblogs.com/jihua"/>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js" type="text/javascript"></script>
</head>
<body>
<div >jihua.cnblogs.com</div>
<div >欢迎</div>
<div >hi</div>
<div >计划</div>
<div >博客园</div>
<div >jihua</div>
<div >cnblogs.com</div>
<div >cnblogs</div>
<div >欢迎光临</div>
<div >A</div>
<div >jihua.cnblogs.com</div>
<div >B</div>
<div >hello</div>
<div >last</div>
<div
onclick="$('body,html').animate({scrollTop:0},800);" > 返<br />回<br />顶<br />部</div>
</body>
</html>