Hey, I've seen this and am probably not looking at it correctly, but I'd like to link a div with alternate images that change when different menu links are rolled-over, like how this menu is set-up:

http://www.dsquared2.com/

after the initial fade out of the landing page image, the menu and alt images fade it. Could someone please direct me to where I can read up on this, or if it's simple enough to explain..?

Thank you.
alston