Development Flash ActionScript

package{
  import flash.display.Sprite;
  import flash.system.Capabilities;
  import flash.net.*;
  public class Main extends Sprite{
    public function Main(){
        var resX:int = flash.system.Capabilities.screenResolutionX;
        var resY:int = flash.system.Capabilities.screenResolutionY;
        
        var winW:int = 200;
        var winH:int = 200;
        
        var winX:int = (resX / 2) - (winW / 2);
        var winY:int = (resY / 2) - (winH / 2);
        
        var jsCode:String = "javascript:void(newWin=window.open('http://www.rntsoft.com/'," + 
                 "'newWindow', 'width=" + winW +
                 ", height=" +  winH + "," + 
                 "left=" + winX + ",top=" + winY + "'));";
        
    }
  }
}