Issue with z-index

So the right-hand flags ( on roll over ) get cut off by the box wid开发者_如何学编程th. How do I get the flag to break out of that box or sit on top of it without changing the page structure ( only with CSS )?

http://www.erfolg-für-alle.de

I'd suggest you to delete overflow: hidden; from wall_container class, but then you have to add float: left, clear: both for div with id "p2".