Make previous movie clip disappear

So I’m in a bit of a dilemma and quite new to actionscript.

I’m working with Flash CS5 and have a button on click trigger a movie clip to fade in. The problem is I want to be able to click any of the buttons on the screen to make it simultaneously hide the previous movieclip if it’s already there and play a new movieclip. Is this possible? If so is there any tutorials/code snippets someone could point me to?

Thanks for any help.