function setOptions(chosen) {

  var selbox = document.reality_search.location;
   
  selbox.options.length = 0;
  
  switch(chosen){
    case "0":
      selbox.options[selbox.options.length] = new Option('Najprv zvoľte kraj','0');
    break;
    case "11":
      selbox.options[selbox.options.length] = new Option('Všetky okresy','11');
      selbox.options[selbox.options.length] = new Option('Bratislava I','2101');
      selbox.options[selbox.options.length] = new Option('Bratislava II','2102');
      selbox.options[selbox.options.length] = new Option('Bratislava III','2103');
      selbox.options[selbox.options.length] = new Option('Bratislava IV','2104');
      selbox.options[selbox.options.length] = new Option('Bratislava V','2105');
      selbox.options[selbox.options.length] = new Option('Malacky','2106');
      selbox.options[selbox.options.length] = new Option('Pezinok','2107');
      selbox.options[selbox.options.length] = new Option('Senec','2108');   
    break;    
    case "12":
      selbox.options[selbox.options.length] = new Option('Všetky okresy','12');
      selbox.options[selbox.options.length] = new Option('Dunajská Streda','2201');
      selbox.options[selbox.options.length] = new Option('Galanta','2202');
      selbox.options[selbox.options.length] = new Option('Hlohovec','2203');
      selbox.options[selbox.options.length] = new Option('Piešťany','2204');
      selbox.options[selbox.options.length] = new Option('Senica','2205');
      selbox.options[selbox.options.length] = new Option('Skalica','2206');
      selbox.options[selbox.options.length] = new Option('Trnava','2207');  
    break;
    case "13":
      selbox.options[selbox.options.length] = new Option('Všetky okresy','13');
      selbox.options[selbox.options.length] = new Option('Bánovce nad Bebravou','2301');
      selbox.options[selbox.options.length] = new Option('Ilava','2302');
      selbox.options[selbox.options.length] = new Option('Myjava','2303');
      selbox.options[selbox.options.length] = new Option('Nové Mesto nad Váhom','2304');
      selbox.options[selbox.options.length] = new Option('Partizánske','2305');
      selbox.options[selbox.options.length] = new Option('Považská Bystrica','2306');
      selbox.options[selbox.options.length] = new Option('Prievidza','2307');
      selbox.options[selbox.options.length] = new Option('Púchov','2308');
      selbox.options[selbox.options.length] = new Option('Trenčín','2309');   
    break;
    case "14":
      selbox.options[selbox.options.length] = new Option('Všetky okresy','14');
      selbox.options[selbox.options.length] = new Option('Komárno','2401');
      selbox.options[selbox.options.length] = new Option('Levice','2402');
      selbox.options[selbox.options.length] = new Option('Nitra','2403');
      selbox.options[selbox.options.length] = new Option('Nové Zámky','2404');
      selbox.options[selbox.options.length] = new Option('Šaľa','2405');
      selbox.options[selbox.options.length] = new Option('Topoľčany','2406');
      selbox.options[selbox.options.length] = new Option('Zlaté Moravce','2407');  
    break;
    case "15":
      selbox.options[selbox.options.length] = new Option('Všetky okresy','15');
      selbox.options[selbox.options.length] = new Option('Bytča','2501');
      selbox.options[selbox.options.length] = new Option('Čadca','2502');
      selbox.options[selbox.options.length] = new Option('Dolný Kubín','2503');
      selbox.options[selbox.options.length] = new Option('Kysucké Nové Mesto','2504');
      selbox.options[selbox.options.length] = new Option('Liptovský Mikuláš','2505');
      selbox.options[selbox.options.length] = new Option('Martin','2506');
      selbox.options[selbox.options.length] = new Option('Námestovo','2507');
      selbox.options[selbox.options.length] = new Option('Ružomberok','2508');
      selbox.options[selbox.options.length] = new Option('Turčianske Teplice','2509');
      selbox.options[selbox.options.length] = new Option('Tvrdošín','2510');
      selbox.options[selbox.options.length] = new Option('Žilina','2511');    
    break;
    case "16":
      selbox.options[selbox.options.length] = new Option('Všetky okresy','16');
      selbox.options[selbox.options.length] = new Option('Banská Bystrica','2601');
      selbox.options[selbox.options.length] = new Option('Banská Štiavnica','2602');
      selbox.options[selbox.options.length] = new Option('Brezno','2603');
      selbox.options[selbox.options.length] = new Option('Detva','2604');
      selbox.options[selbox.options.length] = new Option('Krupina','2605');
      selbox.options[selbox.options.length] = new Option('Lučenec','2606');
      selbox.options[selbox.options.length] = new Option('Poltár','2607');
      selbox.options[selbox.options.length] = new Option('Revúca','2608');
      selbox.options[selbox.options.length] = new Option('Rimavská Sobota','2609');
      selbox.options[selbox.options.length] = new Option('Veľký Krtíš','2610');
      selbox.options[selbox.options.length] = new Option('Zvolen','2611');
      selbox.options[selbox.options.length] = new Option('Žarnovica','2612');
      selbox.options[selbox.options.length] = new Option('Žiar nad Hronom','2613');
    break;
    case "17":
      selbox.options[selbox.options.length] = new Option('Všetky okresy','17');
      selbox.options[selbox.options.length] = new Option('Bardejov','2701');
      selbox.options[selbox.options.length] = new Option('Humenné','2702');
      selbox.options[selbox.options.length] = new Option('Kežmarok','2703');
      selbox.options[selbox.options.length] = new Option('Levoča','2704');
      selbox.options[selbox.options.length] = new Option('Medzilaborce','2705');
      selbox.options[selbox.options.length] = new Option('Poprad','2706');
      selbox.options[selbox.options.length] = new Option('Prešov','2707');
      selbox.options[selbox.options.length] = new Option('Sabinov','2708');
      selbox.options[selbox.options.length] = new Option('Snina','2709');
      selbox.options[selbox.options.length] = new Option('Stará Ľubovňa','2710');
      selbox.options[selbox.options.length] = new Option('Stropkov','2711');
      selbox.options[selbox.options.length] = new Option('Svidník','2712');
      selbox.options[selbox.options.length] = new Option('Vranov nad Topľou','2713');
    break;
    case "18":
      selbox.options[selbox.options.length] = new Option('Všetky okresy','18');
      selbox.options[selbox.options.length] = new Option('Gelnica','2801');
      selbox.options[selbox.options.length] = new Option('Košice - okolie','2802');
      selbox.options[selbox.options.length] = new Option('Košice I','2803');
      selbox.options[selbox.options.length] = new Option('Košice II','2804');
      selbox.options[selbox.options.length] = new Option('Košice III','2805');
      selbox.options[selbox.options.length] = new Option('Košice IV','2806');
      selbox.options[selbox.options.length] = new Option('Michalovce','2807');
      selbox.options[selbox.options.length] = new Option('Rožňava','2808');
      selbox.options[selbox.options.length] = new Option('Sobrance','2809');
      selbox.options[selbox.options.length] = new Option('Spišská Nová Ves','2810');
      selbox.options[selbox.options.length] = new Option('Trebišov','2811');    
    break;
    default:
      selbox.options[selbox.options.length] = new Option('chyba','0');      
    break;
  }
}

function import_gets(){ // Import GET Vars
  document.$_GET = [];
  var urlHalves = String(document.location).split('?');
  if(urlHalves[1]){
    var urlVars = urlHalves[1].split('&');
    for(var i=0; i<=(urlVars.length); i++){
      if(urlVars[i]){
        var urlVarPair = urlVars[i].split('=');
          document.$_GET[urlVarPair[0]] = urlVarPair[1];
      }
    }
  }
};

function init() {
  setOptions(document.reality_search.locationtwo.options[document.reality_search.locationtwo.selectedIndex].value);
  import_gets();
  for (var i = 0; i < document.reality_search.location.options.length; i++) {      //vybrani okresu ktery byl vybran pred hledanim
    if (document.reality_search.location.options[i].value == document.$_GET['location'])
      document.reality_search.location.options[i].selected = "1";
  }
}

window.onload = init;