onLoad () {
  speed = -75;
  pad = 15;
  setProperty(thumbs.width_holder, _width, (_parent._width+pad));
  menuWidth = thumbs._width;
  startX = this._x;
  right_menu._x = thumbs._x + menuWidth;
  left_menu._x = thumbs._x - menuWidth;
  left_menu._y = thumbs._y;
  right_menu._y = thumbs._y;
}
onEnterFrame(includingFirstFrame) {
  if (this._x >= menuWidth || this._x <= (startX-menuWidth)) {
    this._x = startX;
  }
}
onFrame (1) {
  this._vx = speed;
}