Access movieclip via AS3

Hi,

in frame 1, i added several movieclips using an array as following


    this.addChild(arrayBlueMask*);

where arrayBlueMask contains “i” movieclip of mc_BlueCube.

now in frame 2 i would like to access to each of those “i” mc_BlueCube instances, so i tried :


var tmpCube:mc_BlueCube;
var j:Number;
tmpCube = new mc_BlueCube();    
for(j=0;j<i;j++)
{
   tmpCube.name = (mc_BlueCube)(('mc_BlueCube'+j).name)  // instance name
   // here i should change the other property of this ('mc_BlueCube'+j) object
}

…but it does not work.
any idea ?

thanks a lot,

A.