function selekto(selektita) {
  switch(selektita) {
    case "leit":
      parent.location.href = "../";
      break;
    case "anl":
      parent.teksto.location.href = "uzinstrukcioj.html";
      break;
    case "kvar":
      parent.location.href = "../kurs_malnov/index_alt.html";
      break;
    case "du":
      parent.location.href = "../kurs/index_alt.html";
      break;
    case "1":
    case "2":
    case "3":
    case "4":
    case "5":
    case "6":
    case "7":
    case "8":
    case "9":
    case "10":
    case "11":
    case "12":
      var teks = "teks" + selektita + ".html";
      parent.teksto.location.href = teks;
  }
}