Collapsible sidebar

[lilfields10]

I have the following website that has a collapsible side bar http://www.alienwareniche.com/forums/index.php

It works, but once you go to another page it doesn't remember that you collapsed it, so it almost becomes pointless. I would like to make it remember that you collapsed it and it would stay collapsed on all pages until you decided to open it back up. I've read on how the site statistics collapsible, etc works, but they collapse vertically, and I need a horizontal collapse. Is there any way I can do this? I'm currently using the following script that I found on Dynamic Drive to do this http://www.dynamicdrive.com/dynamici...edcollapse.htm

Any help would be appreciated, all I need is for the browser to remember that you have it collapsed and makes it stay collapsed until you decide to reopen it.