Probá con este código:
Código Actionscript:
Ver originalfunction ira (e:MouseEvent):void {
navigateToURL (new URLRequest ("http://www.google.com.ar"), "_blank");
}
function ira2 (e:MouseEvent):void {
navigateToURL (new URLRequest ("http://www.forosdelweb.com"), "_blank");
}
boton.addEventListener (MouseEvent.CLICK, ira);
boton.addEventListener (MouseEvent.MOUSE_DOWN, ira2);
Saludos