Forum Automatic Header size?
 

Hi everyone. :)

I'm having a problem with my site.. I'm trying to set a banner size so it fills the top part of the forum regardless of what size the image is. Like this forum - http://www.cliosport.net/forum/forum.php

If you drag the size of the window in, the image crops itself along with the boarder (it doesn't stick out)

If you try it on my forum http://www.rs200.eu/forum/forum.php the header comes out of the boarder on the right.

Does anybody have any clue how to fix this?