Remove and clear child

1

Hello? everyone :slight_smile:
i have a problem with removing child. In my programm i remove child on event and add this child again in another button event, but this child adds with previous event graphic. How can i clear child?
here code

import com.greensock.*;
import com.greensock.easing.*;
var mcCont:MovieClip = new MovieClip();
var mcMain:MovieClip = new MovieClip();
var format:TextFormat = new TextFormat();
var XML_URL:String;
var mcName:String;
format.color = 0x000000;
format.font = "Arial";    
format.size = 15;
format.bold = true;
format.kerning = true;
addChild(mcMain);
fed.addEventListener(MouseEvent.CLICK, showSub);
mun.addEventListener(MouseEvent.CLICK, showSub);
function showSub(e:Event) {
    switch(e.target.name) {
        case "mun":
            if(mcMain.getChildByName("mc")) { trace("must remove MC"); mcMain.removeChild(mcMain.getChildByName("mc")); }
            e.target.removeEventListener(MouseEvent.CLICK, showSub);
            fed.addEventListener(MouseEvent.CLICK, showSub);
            XML_URL = "http://wellctec.ru/gradstud/xml.php?id=2";
            break;
        case "fed":
            if(mcMain.getChildByName("mc")) { trace("must remove MC"); mcMain.removeChild(mcMain.getChildByName("mc")); }
            e.target.removeEventListener(MouseEvent.CLICK, showSub);
            mun.addEventListener(MouseEvent.CLICK, showSub);
            XML_URL = "http://wellctec.ru/gradstud/xml.php?id=1";
            break;
    }
    var myXMLURL:URLRequest = new URLRequest(XML_URL);
    var myLoader:URLLoader = new URLLoader(myXMLURL);
    myLoader.addEventListener("complete", xmlLoaded);
}
function xmlLoaded(e:Event):void {
    var i:Number = 0;
    var myXML:XML = new XML();
    mcMain.addChild(mcCont);
    mcCont.name = "mc";
       myXML = XML(e.target.data);
       var xmlDoc:XMLDocument = new XMLDocument();
       xmlDoc.ignoreWhite = true;
       var menuXML:XML = XML(e.target.data);
       xmlDoc.parseXML(menuXML.toXMLString());
       var yPl:Number = 60;
       var xPl:Number = 10;
       var yMove:Number = 40; 
    var xCh:Number = 130;
    var myTimeline:TimelineLite = new TimelineLite();
           for each (var MenuItem:XML in myXML.MenuItem) {
           var mc:MovieClip = new MovieClip();
           var myText:TextField = new TextField();
           var listLabel:String = MenuItem.itemLabel.toString();
           myText.autoSize = TextFieldAutoSize.LEFT;
        //myText.embedFonts = true;
           myText.antiAliasType = AntiAliasType.ADVANCED;
        myText.defaultTextFormat = format;
        myText.selectable = false;
        myText.mouseEnabled = false;
           myText.text = listLabel;
        mcCont.alpha = 0;
        mcCont.addChild(mc);
        mc.addChild(myText);
        mc.buttonMode = true;        
           if((i%7)==0) { yPl = yPl + yMove; xPl = 10;}
           mc.x = xPl;   
           mc.y = yPl; 
        xPl = xPl + xCh;
        myTimeline.append( new TweenLite(mc, 0.6, {y:"-5", alpha:1,  ease:Elastic.easeOut}));
        i++;
       }
}