Accidentally exited out of the layer icon in Photoshop CS3?

[SakuralChan^^]

You know where it says "layers, channels, paths" as icons down on the right in that extra window?
I accidentally exited out of the layers icon, and I need it. D:

How do I get it back? I restarted photoshop, but it's still gone.

 

[SHAHBAN]

press F7 or go to window menu - layer