PopUpManager Closing using voGlobal Class

Here give voGlobal class in this common function of closing popup

----------------------
package com.newVlaueObject.vo
{
import flash.events.KeyboardEvent;
import flash.ui.Keyboard;
import mx.core.IFlexDisplayObject;
import mx.managers.PopUpManager;

public class voGlobal
{
private static var _instance:voGlobal;
public function voGlobal(enforce:SingletonEnforcer):void
{
}
public static function get instance():voGlobal
{
if(voGlobal._instance == null){
voGlobal._instance = new voGlobal(new SingletonEnforcer());
}
return voGlobal._instance;
}
public function titleWindow_keyDown(event:KeyboardEvent):void
{
if (event.charCode == Keyboard.ESCAPE) {
PopUpManager.removePopUp(event.currentTarget as IFlexDisplayObject);
}
}
}
}
class SingletonEnforcer{}
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In each Popup object give keydown Event and init event

KeyDown Event is

keyDown="{voGlobal.instance.titleWindow_keyDown(event)}"

In Init event you just focus any one component of popup object
like

txtName.setFocus();