[etc]

Сообщение от lizards

как это — сделать хеш?

var hash:Dictionary = new Dictionary();

…

for (var i:uint = 0; i < n; i++) {
  var thumb:InteractiveObject = thumbnails[i] as InteractiveObject;
  thumb.addEventListener(MouseEvent.MOUSE_DOWN, this.mouseDownHandler);
   hash[thumb] = i;
}

…

private function mouseDownHandler(event:MouseEvent):void {
    var target:InteractiveObject = event.target as InteractiveObject;

    trace(hash[target]);
}