ActionScript may be based on ECMAScript, but they look very different:

  package com.example
  {
      import flash.text.TextField;
      import flash.display.Sprite;

      public class Greeter extends Sprite
      {
          public function Greeter()
          {
              var txtHello:TextField = new TextField();
              txtHello.text = "Hello World";
              addChild(txtHello);
          }
      }
  }

Also, Flash is more than ActionScript.