var last_smenu;
var last_menu_item;
var current_menu_item;

function showSubmenu(top, id)
{
  if (last_smenu) {
    last_smenu.style.display='none';
  }
  if(last_menu_item) {
    if(last_menu_item==current_menu_item) {
      last_menu_item.className = 'current';
    }
    else {
      last_menu_item.className = 'normal';
    }
  }

  last_smenu = document.getElementById(id);
  if (last_smenu) {
    last_smenu.style.display='block';
  }
  if(top) {
    last_menu_item = top;
    last_menu_item.className = 'selected';
  }
}

var current_menu_item;
var current_smenu;
function selectCurrent(menu,item)
{
  current_menu_item = document.getElementById(menu);
  current_menu_item.className = "current";
  current_smenu = "s"+menu;
  showSubmenu(current_menu_item, current_smenu);
  document.getElementById(item).className = "current";
}