I'm working on creating an image (East west bar) that follows the cursor "up and down" BEHIND the text links. So that when someone hoovers over a link(s) the bar will follow the cursor up and down only.

http://www.marquisjackson.com

Notice the links on the left......


What type of script would I use to make such and event happen? I've looked around and cant find any info right off hand.

TY!