subnavigation_ids = ['casinos_nav', 'entertainment_nav', 'dining_nav', 'events_nav'];

function show_sub_navigation(sub_nav_id, element) {
  subnavigation_ids.each(function(nav_id) {
    reset_sub_navigation(nav_id);
  });
  $(sub_nav_id).show();
  element.style.paddingBottom = "2px";
  element.style.marginTop = "0px";
}

function reset_sub_navigation(nav_id) {
  $(nav_id).hide();
  $(nav_id + '_tab').style.paddingBottom = "0px";
  $(nav_id + '_tab').style.marginTop = "2px";
}

function addBookmark(title, url) {
  if (window.sidebar) { // Firefox
    window.sidebar.addPanel(title, url, ""); 
  } else if (window.opera && window.print) { // Opera
    var elem = document.createElement('a');
    elem.setAttribute('href', url);
    elem.setAttribute('title', title);
    elem.setAttribute('rel', 'sidebar');
    elem.click();
  } else if (window.external) { // IE
    window.external.AddFavorite(url, title);
  }
}