AddChild and removeChild with MouseEvent

Question

Hello, I am a newby at AS3. I need help with addChild and removeChild.
I want to make a two buttons one addChild and other removeChild . Friend helped me a little bit, but I didnt uderstand the script ;]
Here is the example script which my friend gave to me. In other words I want to make a button that attached hair and the other that removes.
Should I make a separete custom class for Hair? And if do, can someone help? :]
ActionScript Code:
public function changeHairs (newHair: Hair): Hair
Face.removeChild (oldHairs);
oldHairs = newHair;
Face.addChild (newHair);
newHair return;
Or modify this code. I know how to change text, but dont know how to change objects
ActionScript Code:
package  {
    import flash.display.MovieClip;
    import Button;
    import flash.text.TextField;
    import flash.events.MouseEvent;
    public class Faces2 extends MovieClip
        public var arr:Array = new Array("a1","a2","a3");
        trace("aab");
        public var txt:TextField = new TextField()
        public var btnBack:Button = new Button();
        public var btnFwd:Button = new Button();
        public var arrPos:Number = 0;
        public function Faces2()
            setupInterface();
            setupData(arrPos);
        public function setupInterface():void
            btnBack.x = 100; btnBack.y = 10;
            btnFwd.x = 200; btnFwd.y = 10;
            btnBack.addEventListener(MouseEvent.CLICK, back);
            btnFwd.addEventListener(MouseEvent.CLICK, fwd);
            addChild(btnBack);
            addChild(btnFwd);
            txt.textColor = 0xFF0000;
            txt.width = 300;
            txt.border = true;
            txt.x = 100; txt.y = 100;
            addChild(txt)
        public function fwd(evt:MouseEvent):void
            arrPos ++;
            if(arrPos >= arr.length)
                arrPos = 0;
            setupData(arrPos);
        public function back(evt:MouseEvent):void
            arrPos --;
            if(arrPos < 0)
                arrPos = arr.length - 1;
            setupData(arrPos);
        public function setupData(pos:Number):void
            txt.text = arr[pos];
P.S. sorry for my bad english

Answer 1

did you create your hair movieclip and assign it a class?