function switchMap() {
  mapDiv = getByID("map_div");
  mapSelect = getByID("map_select");
  switch(mapSelect.options[mapSelect.selectedIndex].value) {
    case "lower-level":
      mapDiv.innerHTML = '<a href="/images/floor-plan/lower-level.jpg" class="floatbox"><img alt="#" src="/images/floor-plan/thumbnails/lower-level.jpg" /></a>';
      break;
    case "main-level":
      mapDiv.innerHTML = '<a href="/images/floor-plan/main-level.jpg" class=floatbox><img alt="#" src="/images/floor-plan/thumbnails/main-level.jpg" /></a>';
      break;
    case "first-floor":
      mapDiv.innerHTML = '<a href="/images/floor-plan/first-floor.jpg" class="floatbox" rev="onItemStart"><img alt="#" src="/images/floor-plan/thumbnails/first-floor.jpg" /></a>';
      break;
    case "second-floor":
      mapDiv.innerHTML = '<a href="/images/floor-plan/second-floor.jpg" class="floatbox"><img alt="#" src="/images/floor-plan/thumbnails/second-floor.jpg" /></a>';
      break;
    case "third-floor":
      mapDiv.innerHTML = '<a href="/images/floor-plan/third-floor.jpg" class="floatbox"><img alt="#" src="/images/floor-plan/thumbnails/third-floor.jpg" /></a>';
      break;
  }
  fb.tagAnchors(mapDiv);
  // reloads new floatbox
}