Hi there,
One of two things may have happened:
1. You are in full screen mode in which case you should have a small square somewhere on the screen saying "close full screen". This is probably not the case since you would probably have already tried it, but look anyway, and if there, try it.
2. The other thing is that someone turned all your toolbars off. Try to press the alt and V keys at the same time. Then press T followed by C. If you get the "Customize" window to come up select the "Menu Bar", "Standard", and "Formatting" check boxes, then "Close".
Good Luck. Hope this helps
C_M_S