NOOB Question

So I’m just getting into AS3 and I’m actually liking it a lot. Makes things much more organized. However, I’m confused as how to reference methods in different places. I understand that I can reference a method of class that I pull into something, but how do I do it the other way around? Am I even supposed to? Let me explain more:

My Class:
package com.selectBox{

import flash.display.Sprite;
import flash.display.Loader;
import com.selectBox.DropDownItem;

public class DropDown extends Sprite{
    public function DropDown(xmlObject:XML){
        //find resort object in xml
        var regionList:XMLList = xmlObject.region;
        // add submenu items to holder and apply button functionality
        for(var q:Number = 0; q<regionList.length(); q++){
            var tmpText:String = regionList[q].attribute('title');
            var tmpID:String = regionList[q].attribute('id');;
            tmpText = tmpText.toUpperCase();
            var subMenu:DropDownItem = new DropDownItem(tmpText);
            subMenu.y = subMenu.height*q;
            subMenu.ID = tmpID;
            //subMenu.addEventListener(MouseEvent.CLICK, onSubmenuClick);
            subMenu.mouseChildren = false;
            subMenu.buttonMode = true;
            subMenu.addEventListener(MouseEvent.ROLL_OVER, onSubmenuOver);
            subMenu.addEventListener(MouseEvent.ROLL_OUT, onSubmenuOut);
            subMenu.addEventListener(MouseEvent.CLICK, onSubmenuClick);
    private function onSubmenuOver(evt:MouseEvent):void{
    private function onSubmenuOut(evt:MouseEvent):void{
    private function onSubmenuClick(evt:MouseEvent):void{
        parent.updateDropDown(evt.currentTarget.ID, evt.currentTarget.btnName.text);


My Stage:
import com.selectBox.DropDown;
import com.utilities.SimpleRectangle;

var xmlLoader:URLLoader = new URLLoader();
var regionData:XML = new XML();
var subMenu_holder:Sprite;
var subMenuY:Number;
var subMenuisOpen:Boolean = false;

//load up regional information
xmlLoader.addEventListener(Event.COMPLETE, LoadXML);
xmlLoader.load(new URLRequest(“regions.xml”));

//build regional dropdown menu
function LoadXML(e:Event):void {
regionData = new XML(;

// create holder for sub menu items
subMenu_holder = new Sprite();

// add menu items
var dropDown:DropDown = new DropDown(regionData);

// we don't know how many items there are so we have to wait until after filling it
// and then subtract the height of it (plus some padding) from the y of the box
subMenu_holder.x = content_com.x + content_com.combo_mc.x;
subMenu_holder.y = (content_com.y + content_com.combo_mc.y) - (subMenu_holder.height + 5);

//set starting/end y position of subMenu_holder
subMenuY = subMenu_holder.y;

//create mask for the menu just below box
var subMask:SimpleRectangle = new SimpleRectangle;
subMask.x = content_com.x + content_com.combo_mc.x;
subMask.y = content_com.y + content_com.combo_mc.y + content_com.combo_mc.height;
subMask.width = subMenu_holder.width;
subMask.height = subMenu_holder.height;
subMenu_holder.mask = subMask;


function updateDropDown(ID:Number, _label:String):void{
trace(ID, _label);

My question lies in the onSubmenuClick function in my class. I want to update a function on the stage with the info contained in the item clicked on when the user click on that item. What is the best way to do this? or like I said, how do I do this the “right way”?