Loading Several MovieClips Into Separate Variables?

I have several Movie Clips in the Library which I need to be able to load and bring up on the screen randomly.The code below shows how I can load one of these, but to get a proper control ideally I would like to load them all in to an array or numbered variables so that they can be called from a simple piece of code and actioned one at a time.

My movieclips can all be called something simple like mc1, mc2, mc3, mc4 etc to make things easier.These need to be referenced in to an array mcContainer[.....] or as mcContainer1, mcContainer2........ so that they can be called easily.I just need to know the simplest way to do this and how i reference them, I have tried several ways like ["mc"+i] etc and nothing seems to work.

Code:

var mc:mcLogo=new mcLogo();
addChild(mc);