After visiting Banana Republic I noticed a cool mouseover that is located at the top of their page. Where the Banana Republic logo is, there is a group of images (navigation) and if you mouseover those images, you will see a "Description Image" next to those mouseover images. I think that is very cool and I would like to know, how can I get a similar effect on my site. I've been looking at various JavaScript sites but I am unable to find that script or a script similar. Does anyone know how I can acheive that same effect on my site?

Thanks in advance!