function showSubMenu(menu) {
  var divOuter = $("mainContainer").select("div#topMenuContainer div#divSubMenuOuter")[0];
  if ($("mainContainer").select("div#topMenuContainer div.divSubMenu ul." + menu).length>0 &&  !divOuter.visible()) {
    Effect.BlindDown(divOuter);
  }
  

  $("mainContainer").select("div#topMenuContainer div.divSubMenu").each(function(o) {
    if (!o.visible()) {
      Effect.BlindDown(o);
    }
  });
  $("mainContainer").select("div#topMenuContainer div.divSubMenu ul").invoke("hide");
  $("mainContainer").select("div#topMenuContainer div.divSubMenu ul." + menu).invoke("show");
}