[CM] switch between processes

[Achim Bornhoeft]

Hi,
what is the easiest approach to switch between two running processes  
(CM2)?
e.g. start two prozesses at the same time, output only process 1, then  
switch to process 2, output only process 2 while process 1 is still  
running, switch back to process 1, output only process 1 while process  
2 ist still running, etc.

process 1: ________ _ _ _ _ _ _ _ ________________
                    |             |
		   |             |
process 2: _ _ _ _ _______________ _ _ _ _ _ _ _ _

Thanks for any help.
Achim