實現回到頂部功能的jQuery插件：jQuery.toTop

jQuery.toTop 是一個輕量級的可定制的插件，實現回到頂部的功能。

1. At first include jQuery and jquery.toTop.js

<script src="http://code.jquery.com/jquery-1.11.3.min.js"></script>  <script src="jquery.toTop.min.js"></script>

2. Include HTML

  <a class="to-top">Top &uarr;</a>

You can add and style your element as you want

3. Activate the Plugin

  $('.to-top').toTop();

項目主頁：http://www.baiduhome.net/lib/view/home/1433146148322