Footer problems in firefox.

Although this was a problem in both IE and Firefox. I seemed to have fixed the I.E. Footer problem.. If you take a look here using firefox… you will see what i mean. http://www.adiolog.com/index.php?s=send&submit=Search
You can see that when there is little content on a page. The footer rises all the way up to where the little content ends. Instead of sitting at the bottom, where it should be. Someone please help as i know this is a simple problem.
Thanks.