Scrolling Menu

Hi,

At Ironmonkey’s site (http://enterthemonkey.com), they are able to have a scrolling menu on the bottom of their interactive site which displays all of their past sites that they’ve worked on. As you go over it the scrolling stops, and when you move off of it, it resumes. Does anyone happen to know where I may find a tutorial on how to do this or where I can go to find out how to do this?

Thanks in advance.
Alpesh