Multiple movie with on function

I want to be able to create more than one movie clip with different names. But right now i can only create one named “triangel”. But i want to be able to create multiple movieclips with the ‘string’ which is passed as a parameter.

This is my code now:

[AS]
_global.Box = function(string, h, b)
{
_root.createEmptyMovieClip (“triangel”, 1);
with (_root.triangel)
{
beginFill (0xEEEEEE, 100);
lineStyle (0.1, 0xBBBBBB, 100);
moveTo (200, 200);
lineTo (200, 200+h);
lineTo (200+b, 200+h);
lineTo (200+b, 200);
lineTo (200, 200);
endFill();
}
}

Box(“fet”,200,200);
Box(“gus”,-100,-100);
[/AS]

How could I do this?

What i want to know i the _root.xxx part
i want to be able to dynamically change that depending on the ‘string’ parameter

thx