function showMenu(idm) {
  if (activeMenu != ""){
    activeMenu.className = "";
    document.getElementById(activeMenu).style.display = "none";
  }
  if (idm == activeMenu){
    activeMenu = "";
  } else {
    document.getElementById(idm).style.display = "block";
    activeMenu = idm;
  }
  return false;
}

function initMenu(idm) {
	activeMenu=idm;
}