Parent SWF controlling Child SWF variables

Question

1) The code below works but the browser sends an annoying
alert message
“Received Parent Message” and you are obliged to
click OK before the program can run. How can it be fixed ?
2) Why this code needs to use the
ExternalInterface class if the Child SWF gets loaded and
becomes incorporated in the Parent SWF ?
3) Is there a
simpler and more straightforward way for a Parent SWF to
communicate with a Child SWF ?
package
import flash.external.ExternalInterface;
import flash.display.Sprite;
import flash.text.*;
public class ChildMovie extends Sprite
public function ChildMovie():void
public function alert(msg:String):void
ExternalInterface.call('alert', msg);
txt.text = msg;
package
import flash.display.Loader;
import flash.net.URLRequest;
import flash.events.Event;
import flash.display.LoaderInfo;
import flash.display.Sprite;
public class ParentMovie extends Sprite
public function ParentMovie():void
var loader:Loader = new Loader();
loader.contentLoaderInfo.addEventListener(Event.COMPLETE,
onLoadComplete);
loader.load(new URLRequest('ChildMovie.swf'));
private function onLoadComplete(e:Event):void
var loaderInfo:LoaderInfo = e.target as LoaderInfo;
addChild(e.target.content);
var swf:Object = loaderInfo.content;
swf.x = 75;
swf.y = 50;
swf.alert('Received Parent Message');

Answer 1

Hi,
You can launch the SWF in new window with navigateToURL() available in flash.net package by passing the path of SWF as parameter to function as
navigateToURL(new URLRequest(domainPath + "/appmanager/login.swf"));