Dynamic load of library items

I’m new here and I have a problem.
I have a couple of movieclips in my library (there’s 52 of them actually, I’m making a card game. :)) and I have them exported for actionscript through the property menu.
Is it possible to load them by passing a variable with the name of the movieclip class?
Something like:

function showCard( card:String ):void {
var mc:MovieClip = new card();
addChild( mc );

showCard( ‘aceOfSpades’ );

I know this example doesn’t work but I hope it helps you understand what i want to do.