function expand(lnk, n) {
  obj = document.getElementById(n);
  if (!obj) return false;
if (obj.style.display == "none"){
  lnk.className = "a_tur_menu_1";
  obj.style.display = "block";
  return;
}
if (obj.style.display == "block"){
  obj.style.display = "none";
  lnk.className = "a_tur_menu_0";
  return;
}
}