Event.observe(window, 'load', function () {
  if ($('citybreakReservationButton')) {
    $('citybreakReservationButton').observe('click', function() {
      document.location.href = onlineReservationPage;
    });
  }
});

function showMap() {
  new Effect.Appear('mapContainer');
}

function closeMap() {
  new Effect.Fade('mapContainer');
}