[xmonad] Behaviour of window stack when closing a window

[Sönke Hahn]

Hi!

When closing a window, the focus goes to the next window in the stack, if it 
exists (e.g. "head $ down currentStack"). What is the best way to change 
that behaviour to let the focus go to the previous window in the window 
stack (e.g. "head $ up currentStack")?

(btw: This is my first post to a list using a newsreader client, so: Am I 
doing this right?)

Thanks,
Sönke