Spawn Enemies in ActionScript 3.0 - actionscript-3

Question

Something is going wrong in my mind, In my game , I want to instantiate enemies within library and put them on stage. so I create an EnemySpawner class and I put an instance from that class onto the stage . ( drag drop from library and give it a instance name). So here is the code for EnemySpawner class:
package scripts {
import flash.display.MovieClip;
public class EnemySpawner extends MovieClip {
var positions: Array = new Array(); // clockwise spawn positions
var enemies : Array = new Array();
var spwan:Boolean=false;
public function EnemySpawner() {
positions.push(MovieClip(root).rightPos);
positions.push(MovieClip(root).leftPos);
enemies.push("Enemy1");// here is the problem
}
public function tick(): void {
}
public function doSpwan():void{
}
}
}
So the problem issues here is , I want to randomly load enemies from library and instance them on stage , the design environment is something like this :
There are diffrent enemy movieclips in library with same blass class:
I don't want to assign each enemy a new class , for example I don't want to assign EnemyA Class to Enemy1 MovieClip Object and EnemyB Class to Enemy2 MovieClip . I want All Enemy MovieClip in the library share same class Enemy. so but using this , instantiate is hard task, I don't know how to instantiate enemies by using this method?
I know if I have separate class for each Enemy I can do this:
var e1 : Enemy1 = new Enemy1();
var e2 : Enemy2 = new Enemy2();
...
var e3 : Enemy3 = new Enemy3();
But I want do something like this:
//Pseudocode:
//Instantiate form library (Name Of Enemy1); //base class is enemy 1
//Instantiate form library (Name Of Enemy1); //base class is enemy 1
//Instantiate form library (Name Of Enemy1); //base class is enemy 1
Thanks in advance.

Answer 1

It's an easy task, actually. Assign enemies with different classes, then
// List classes in this Array.
var Enemies:Array = [Enemy1, Enemy2, Enemy3];
// Get a random class from the list.
var anIndex:int = Math.random() * Enemies.length;
var EnemyClass:Class = Enemies[anIndex];
// Spawn a random enemy.
// You can have a common superclass, or just use MovieClip or Sprite they are subclassed from.
var anEnemy:MovieClip = new EnemyClass;