Help me please?go to frame 1. movie clip action?

i am building a functional user prototype.
anyway it comsists of four main active menus. the menus are all movieclips that are activated by a button on the first frame of that mc.

what i need to kno is how can i actscrpt the buttons in each mc so when i am on frame5 of mc1 and i want to start mc2 by pressing the button on its first frame, it will then return to frame1,mc1 before playing mc2.

maybe confuse u?