Movie clip object - a button

hi guys, i need your help, ive done this before but forgot how i did this, ok for example on main timeline, i have 2 movieclips, 1 is my button and 1 is a animation inside the movieclip, so on my movie clip button, i have the actual button inside that movie clip, ok how do i make, when i hit my buton its gonna play the animation inside the moviclip on the main timeline? i remember i have to goto the root or parent again then go inside that movieclip animation, whats the actionscipt again for that? many thanks guys!!

another question is, i have a button and a movieclip on the main timeline, when i press my button it will play the animation inside the movieclip, how do i achieve that? thanks again