Show hide but swap image

Hi,
I have included a link but basically i need the second row of images (onmouseover) to swap with the image that is currently appearing underneath. Also when you hover on another image the other second row images reset! so only 1 can be swapped displayed at once.

The code is in the page to see what I have done so far.

http://www.miamidolphinsuk.com/jquery.html

Thanks,

Scooper13