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>
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<div style=" background-color:Green; width:100%;height:150px;">jihua.cnblogs.com</div>
<div style=" background-color:Red; width:100%;height:150px;">欢迎</div>
<div style=" background-color:Yellow; width:100%;height:150px;">hi</div>
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<div style=" background-color:Green; width:100%;height:150px;">A</div>
<div style=" background-color:Purple; width:100%;height:150px;">jihua.cnblogs.com</div>
<div style=" background-color:Green; width:100%;height:150px;">B</div>
<div style=" background-color:Lime; width:100%;height:150px;">hello</div>
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onclick="$('body,html').animate({scrollTop:0},800);" > 返<br />回<br />顶<br />部</div>
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