Loading and playing internal movie clips randomly

Hi!!! Does anyone out there know how to get movie clips to play randomly? Here’s what I want to do:

I have four movie clips already created and I want to make it so that when someone visits the page and accesses it for the first time, one of the four is randomly selected and plays (I also want to be able to tell it what frame of the movie clip to go to)!

I know some genius out there has the answer! Help!!!