btw i sorted out myself and these codes were very helpful

Actionscript Code:
/*  convert array objects into movieclip */
    for (var i:uint = 0; i < buttonArray.length ; i++)
    {
        var remov = buttonArray[i];
        var ins:MovieClip = MovieClip(mc.getChildByName(remov));
        ins.gotoAndStop(1);
    
    }


Actionscript Code:
/*  detecting objects inside container or movieclip */
    
    for (var i:uint = 0; i < mc.numChildren; i++){
    trace (i+'.\t name:' + mc.getChildAt(i).name +
           '\t type:' + typeof (mc.getChildAt(i))+
           '\t' + mc.getChildAt(i));
    }