var currentMainMenu = 0;

function showMenu(menuID) {
   if (document.getElementById("menu"+menuID) != null) {
      for (var i=0; i < arrayMenues.length; i++) {
         document.getElementById(arrayMenues[i]).style.visibility = "hidden";
      }
      if (currentMainMenu > 0)
         document.getElementById("mainMenu"+currentMainMenu).style.color = "#CADEEF";
      document.getElementById("menu"+menuID).style.visibility = "visible";
      document.getElementById("mainMenu"+menuID).style.color = "#FFFFFF";
      currentMainMenu = menuID;
   }
}