private var windows:Array;
private var defaultContainer:DisplayObjectContainer;
private var pWidth:int;
private var pHeight:int;

public function AdvAlertManager(defaultWindowContainer:DisplayObjectContainer, parentWidth:int, parentHeight:int) 
{
trace(": AdvAlertManager instance created.");

defaultContainer = defaultWindowContainer;
pWidth = parentWidth;
pHeight = parentHeight;
windows = [];
}

public function alert(text:String, width:int = 300, height:int = 200, position:Point = null):void {
if (position == null) position = new Point((pWidth / 2) - (width / 2), (pHeight / 2) - (height / 2));
var w:AdvAlertWindow = new AdvAlertWindow(text, width, height, position);
windows.push(w);
defaultContainer.addChild(w);

trace("Message: " + text);
}

package com.kircode 
{
import flash.display.DisplayObjectContainer;
import flash.display.MovieClip;
import flash.geom.Point;
/**
 * Advanced Alert window manager.
 * @author Kirill Poletaev
 */
public class AdvAlertManager 
{
private var windows:Array;
private var defaultContainer:DisplayObjectContainer;
private var pWidth:int;
private var pHeight:int;

/**
 * AdvAlertManager constructor.
 * @paramdefaultWindowContainer Parent container of alert windows.
 * @paramparentWidth Containers width.
 * @paramparentHeight Containers height.
 */


public function AdvAlertManager(defaultWindowContainer:DisplayObjectContainer, parentWidth:int, parentHeight:int) 
{
trace(": AdvAlertManager instance created.");

defaultContainer = defaultWindowContainer;
pWidth = parentWidth;
pHeight = parentHeight;
windows = [];
}

/**
 * Create an alert window.
 * @paramtext Text value of the alert window.
 * @paramwidth (Optional) Width of the alert window. 300 by default.
 * @paramheight (Optional) Height of the alert window. 200 by default.
 * @paramposition (Optional) Coordinates of top-left corner of the alert window. If not specified - the window is centered.
 */

public function alert(text:String, width:int = 300, height:int = 200, position:Point = null):void {
if (position == null) position = new Point((pWidth / 2) - (width / 2), (pHeight / 2) - (height / 2));
var w:AdvAlertWindow = new AdvAlertWindow(text, width, height, position);
windows.push(w);
defaultContainer.addChild(w);

trace("Message: " + text);
}

}

}

private var t:String;
private var w:int;
private var h:int;
private var pos:Point;

public function AdvAlertWindow(pt:String, pw:int, ph:int, ppos:Point) 
{
t = pt;
w = pw;
h = ph;
pos = ppos;
updateDraw();
}

public function updateDraw():void {
this.graphics.clear();
this.graphics.beginFill(0xcccccc, 1);
this.graphics.drawRect(pos.x, pos.y, w, h);
this.graphics.endFill();
}

package com.kircode 
{
import flash.display.MovieClip;
import flash.geom.Point;
/**
 * Advanced Alert window object.
 * @author Kirill Poletaev
 */
public class AdvAlertWindow extends MovieClip
{
private var t:String;
private var w:int;
private var h:int;
private var pos:Point;

public function AdvAlertWindow(pt:String, pw:int, ph:int, ppos:Point) 
{
t = pt;
w = pw;
h = ph;
pos = ppos;
updateDraw();
}

public function updateDraw():void {
this.graphics.clear();
this.graphics.beginFill(0xcccccc, 1);
this.graphics.drawRect(pos.x, pos.y, w, h);
this.graphics.endFill();
}

}

}

package  
{
import com.kircode.AdvAlertManager;
import flash.display.MovieClip;
import flash.events.Event;
import flash.geom.Point;
/**
 * ...
 * @author Kirill Poletaev
 */
public class main extends MovieClip
{
private var AlertManager:AdvAlertManager;

public function main() 
{
addEventListener(Event.ADDED_TO_STAGE, init);
}

private function init(evt:Event):void {
AlertManager = new AdvAlertManager(this, stage.stageWidth, stage.stageHeight);
AlertManager.alert("This is a test message!");
// Same results as:
// AlertManager.alert("This is a test message!", 300, 200, new Point(125,100));
}

}

}