Selection.set.....WHAT!?

Hi All!
Here is the link:
http://www.pyroblue.com/test/marcomm/stage.html

Click the different menu “things”
I want to be able to (when clicked) bring that piece of paper to the front. I thought something like Selection.setFocus would get me going. But no.
Am I going in the right direction with that? Or most likely am I way off.

Thank you for your time and help!!