Newbie: switching cameras

Hello !
I have 2 cameras.
If i press F1 the main camera is active.
If i press F2, the second camera becomes active.

How can I automatically switch using only 1 key ?
(press F1 -> main cam. Press another time F1 -> second cam)
Is it possible with logics bicks or do i need a PYTHON script ?

i did it all with logicbricks, pretty simple, check the file and you should understand how it’s done.

http://mysite.iptic.com/cluh/cameraswitch.blend

Exactly what I was looking 4 ! Many Thanks.
(I’ve changed space key by F1).