Add "Top of Page" link to a Script

Question

I am using this plugin to make a list of all the Categories on my Wordpress blog :

http://pastebin.com/raw.php?i=T6rvtwkS

The script can be seen in action here :

www.animefushigi.com/full-anime-list

Now, I want to add a link to Top of page under each set of alphebetical listings, so right after each </ul>

I want to add this :

<a href="javascript:scroll(0,0)">
Top
</a>

Where and How can I implement that in the plugin script???