function posi()
{
  for (i = 0; i < 261; i++) {
    for (j = 0; j < 13; j++) {
      if (position.tzolkinzahl.options[j].selected) tzzahl = (j+1);}
    for (j = 0; j < 20; j++) {
      if (position.tzolkinname.options[j].selected) tzname = tzolkinname[j];}
    if ((tzzahl == tzolkinzahl[i])&& (tzname == tzolkinname[i])) posi = i + 1;
  }
  alert("Die Position ist: " + posi);
}