淘宝taobao内页回到顶部功能js代码

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script> <script type=text/javascript src="gotop.js"></script> <div style='height:1000px'> content 滚动进度条即可看到效果 </div>