function linkCats(objProv,objTown){
  var lngCat = objProv.options[objProv.selectedIndex].value;
  if (objProv.selectedIndex == 0)
   { objTown.options.length == 0;
     objTown.options.length = 0;
     objTown.options[0] = new Option("(selecteer krijgsmachtdeel)","");
   };
   
   
   
    if (lngCat == 103)
    { objTown.options.length = 0;
     objTown.options[0] = new Option("geen selectie",'103');    


    
     objTown.options[objTown.options.length] = new Option ("AAT/Intendance/TD",'185');
    
     objTown.options[objTown.options.length] = new Option ("Artillerie",'231');
    
     objTown.options[objTown.options.length] = new Option ("cavalerie",'105');
    
     objTown.options[objTown.options.length] = new Option ("Genie",'225');
    
     objTown.options[objTown.options.length] = new Option ("infanterie",'104');
    
     objTown.options[objTown.options.length] = new Option ("Verbindingsdienst",'224');
    
    };
    
   
   
    if (lngCat == 106)
    { objTown.options.length = 0;
     objTown.options[0] = new Option("geen selectie",'106');    


    
     objTown.options[objTown.options.length] = new Option ("AAT/Intendance/TD",'109');
    
     objTown.options[objTown.options.length] = new Option ("artillerie",'112');
    
     objTown.options[objTown.options.length] = new Option ("cavalerie",'108');
    
     objTown.options[objTown.options.length] = new Option ("Geneeskundige dienst/troepen",'111');
    
     objTown.options[objTown.options.length] = new Option ("Genie",'114');
    
     objTown.options[objTown.options.length] = new Option ("infanterie",'107');
    
     objTown.options[objTown.options.length] = new Option ("Luchtdoelartillerie",'113');
    
     objTown.options[objTown.options.length] = new Option ("Milva",'173');
    
     objTown.options[objTown.options.length] = new Option ("Natres",'186');
    
     objTown.options[objTown.options.length] = new Option ("Nieuw-Guinea",'223');
    
     objTown.options[objTown.options.length] = new Option ("Overig",'157');
    
     objTown.options[objTown.options.length] = new Option ("TRIS",'205');
    
     objTown.options[objTown.options.length] = new Option ("Verbindingsdienst",'110');
    
    };
    
   
   
    if (lngCat == 116)
    { objTown.options.length = 0;
     objTown.options[0] = new Option("geen selectie",'116');    


    
     objTown.options[objTown.options.length] = new Option ("1 GGW  Handorf",'117');
    
     objTown.options[objTown.options.length] = new Option ("1 GGW  Peel vanaf 1994",'118');
    
     objTown.options[objTown.options.length] = new Option ("12 GGW  Hesepe",'163');
    
     objTown.options[objTown.options.length] = new Option ("2 GGW  Schoeppingen",'159');
    
     objTown.options[objTown.options.length] = new Option ("2LVG",'240');
    
     objTown.options[objTown.options.length] = new Option ("3 GGW  Blomberg",'160');
    
     objTown.options[objTown.options.length] = new Option ("303 verzorgings commando",'254');
    
     objTown.options[objTown.options.length] = new Option ("4 GGW  Hessisch Oldendorf",'161');
    
     objTown.options[objTown.options.length] = new Option ("5 GGW  Stolzenau",'162');
    
     objTown.options[objTown.options.length] = new Option ("Actief Reservisten (SRES)",'237');
    
     objTown.options[objTown.options.length] = new Option ("D.E.L.M Rhenen",'252');
    
     objTown.options[objTown.options.length] = new Option ("Hoofdkwartier Koninklijke Luchtmacht",'216');
    
     objTown.options[objTown.options.length] = new Option ("KKSL-Schaarsbergen",'232');
    
     objTown.options[objTown.options.length] = new Option ("Klu in Nieuw Guinea",'236');
    
     objTown.options[objTown.options.length] = new Option ("Limos Nijmegen Snijders kazerne",'170');
    
     objTown.options[objTown.options.length] = new Option ("Luchtmacht Verbindings en Meterologische Groep",'239');
    
     objTown.options[objTown.options.length] = new Option ("LUOS",'230');
    
     objTown.options[objTown.options.length] = new Option ("Luva",'171');
    
     objTown.options[objTown.options.length] = new Option ("Nieuw Milligen",'227');
    
     objTown.options[objTown.options.length] = new Option ("NSA navigatiestation achterhoek",'245');
    
     objTown.options[objTown.options.length] = new Option ("NSN navigatiestation noord-holland",'247');
    
     objTown.options[objTown.options.length] = new Option ("Overig",'246');
    
     objTown.options[objTown.options.length] = new Option ("vlb Deelen",'165');
    
     objTown.options[objTown.options.length] = new Option ("vlb Eindhoven",'166');
    
     objTown.options[objTown.options.length] = new Option ("vlb Gilze-Rijen",'164');
    
     objTown.options[objTown.options.length] = new Option ("vlb Leeuwarden",'119');
    
     objTown.options[objTown.options.length] = new Option ("vlb Soesterberg",'169');
    
     objTown.options[objTown.options.length] = new Option ("vlb Twenthe",'168');
    
     objTown.options[objTown.options.length] = new Option ("vlb Volkel",'167');
    
     objTown.options[objTown.options.length] = new Option ("vlb Woensdrecht",'217');
    
     objTown.options[objTown.options.length] = new Option ("vlb Ypenburg",'235');
    
    };
    
   
   
    if (lngCat == 120)
    { objTown.options.length = 0;
     objTown.options[0] = new Option("geen selectie",'120');    


    
     objTown.options[objTown.options.length] = new Option ("Amfibisch Vaartuig (korps Mariniers)",'128');
    
     objTown.options[objTown.options.length] = new Option ("Bevoorradingsschepen",'152');
    
     objTown.options[objTown.options.length] = new Option ("Commandement Zeemacht Nieuw Guinea",'220');
    
     objTown.options[objTown.options.length] = new Option ("Commandement Zeemacht Caribisch Gebied",'126');
    
     objTown.options[objTown.options.length] = new Option ("Commandement Zeemacht Nederland",'125');
    
     objTown.options[objTown.options.length] = new Option ("Communicatievaartuig Nederlandse Antillen",'155');
    
     objTown.options[objTown.options.length] = new Option ("Directie Economisch Beheer",'124');
    
     objTown.options[objTown.options.length] = new Option ("Directie Materieel",'123');
    
     objTown.options[objTown.options.length] = new Option ("Directie Personeel",'122');
    
     objTown.options[objTown.options.length] = new Option ("Duiksloepen",'149');
    
     objTown.options[objTown.options.length] = new Option ("Fregatten",'132');
    
     objTown.options[objTown.options.length] = new Option ("Kanonneerboten",'133');
    
     objTown.options[objTown.options.length] = new Option ("Korps Mariniers",'127');
    
     objTown.options[objTown.options.length] = new Option ("Kruisers",'130');
    
     objTown.options[objTown.options.length] = new Option ("Kustmijnenvegers",'139');
    
     objTown.options[objTown.options.length] = new Option ("Kustsleepboten",'146');
    
     objTown.options[objTown.options.length] = new Option ("Marinestaf",'121');
    
     objTown.options[objTown.options.length] = new Option ("Mariniersbrigade Indie",'218');
    
     objTown.options[objTown.options.length] = new Option ("Marva",'172');
    
     objTown.options[objTown.options.length] = new Option ("matrozenkapel",'257');
    
     objTown.options[objTown.options.length] = new Option ("Mijnenjager",'136');
    
     objTown.options[objTown.options.length] = new Option ("Mijnenjagers",'141');
    
     objTown.options[objTown.options.length] = new Option ("Mijnenlegger",'142');
    
     objTown.options[objTown.options.length] = new Option ("Mijnenvegers",'137');
    
     objTown.options[objTown.options.length] = new Option ("Nettenwerkschip",'145');
    
     objTown.options[objTown.options.length] = new Option ("Oceaanmijnenvegers",'138');
    
     objTown.options[objTown.options.length] = new Option ("Oceanografisch Onderzoekvaartuig",'144');
    
     objTown.options[objTown.options.length] = new Option ("Onderzeebootjagers",'226');
    
     objTown.options[objTown.options.length] = new Option ("Onderzeeboten",'134');
    
     objTown.options[objTown.options.length] = new Option ("Ondiepwatermijnenvegers",'140');
    
     objTown.options[objTown.options.length] = new Option ("Opleidingsvaartuigen",'153');
    
     objTown.options[objTown.options.length] = new Option ("Opnemingsvaartuigen",'143');
    
     objTown.options[objTown.options.length] = new Option ("Patroullevaartuigen",'135');
    
     objTown.options[objTown.options.length] = new Option ("Sleepboten",'147');
    
     objTown.options[objTown.options.length] = new Option ("Torpedobootjagers",'131');
    
     objTown.options[objTown.options.length] = new Option ("Torpedo-inschietvaartuig",'151');
    
     objTown.options[objTown.options.length] = new Option ("Torpedowerkschip",'150');
    
     objTown.options[objTown.options.length] = new Option ("Vliegdekschip",'129');
    
     objTown.options[objTown.options.length] = new Option ("Vml. Ned.-Indië",'233');
    
     objTown.options[objTown.options.length] = new Option ("Voorraadschip",'154');
    
     objTown.options[objTown.options.length] = new Option ("Wachtschepen",'156');
    
     objTown.options[objTown.options.length] = new Option ("Zeilend Schoolschip",'148');
    
    };
    
   
   
    if (lngCat == 174)
    { objTown.options.length = 0;
     objTown.options[0] = new Option("geen selectie",'174');    


    
     objTown.options[objTown.options.length] = new Option ("Buitenlandse eenheden",'182');
    
     objTown.options[objTown.options.length] = new Option ("District Gelderland / Overijssel / Flevoland",'181');
    
     objTown.options[objTown.options.length] = new Option ("District Koninklijke Marechaussee Schiphol",'178');
    
     objTown.options[objTown.options.length] = new Option ("District Noord",'184');
    
     objTown.options[objTown.options.length] = new Option ("District Noord-Brabant / Limburg",'179');
    
     objTown.options[objTown.options.length] = new Option ("District Noord-Holland / Utrecht",'180');
    
     objTown.options[objTown.options.length] = new Option ("District Zuid-Holland / Zeeland",'177');
    
     objTown.options[objTown.options.length] = new Option ("marechaussee in vmlg. ned. Indie",'249');
    
     objTown.options[objTown.options.length] = new Option ("Overige eenheden",'183');
    
    };
    
   
   
    if (lngCat == 187)
    { objTown.options.length = 0;
     objTown.options[0] = new Option("geen selectie",'187');    


    
     objTown.options[objTown.options.length] = new Option ("AFOR",'222');
    
     objTown.options[objTown.options.length] = new Option ("Desert-Storm Saudi Arabië",'201');
    
     objTown.options[objTown.options.length] = new Option ("Ecmm",'200');
    
     objTown.options[objTown.options.length] = new Option ("Ifor",'206');
    
     objTown.options[objTown.options.length] = new Option ("Isaf Afghanistan",'193');
    
     objTown.options[objTown.options.length] = new Option ("Kfor",'191');
    
     objTown.options[objTown.options.length] = new Option ("Mfo Sinai",'194');
    
     objTown.options[objTown.options.length] = new Option ("NDVN Korea",'190');
    
     objTown.options[objTown.options.length] = new Option ("Operation Amber Fox",'207');
    
     objTown.options[objTown.options.length] = new Option ("Operation Deny Flight",'203');
    
     objTown.options[objTown.options.length] = new Option ("Operation Enduring Freedom",'219');
    
     objTown.options[objTown.options.length] = new Option ("Operation Essential Harvest",'208');
    
     objTown.options[objTown.options.length] = new Option ("Operation Heaven/Provide Comfort Irak/Turkije",'202');
    
     objTown.options[objTown.options.length] = new Option ("Operation Luis Carib",'251');
    
     objTown.options[objTown.options.length] = new Option ("Operation PROVIDE CARE/Rwanda",'234');
    
     objTown.options[objTown.options.length] = new Option ("Sfor",'192');
    
     objTown.options[objTown.options.length] = new Option ("Unavem Angola",'196');
    
     objTown.options[objTown.options.length] = new Option ("UNFICYP",'238');
    
     objTown.options[objTown.options.length] = new Option ("Unifil",'189');
    
     objTown.options[objTown.options.length] = new Option ("UNMEE",'221');
    
     objTown.options[objTown.options.length] = new Option ("UNMIBH",'204');
    
     objTown.options[objTown.options.length] = new Option ("Unomoz Moçambique",'198');
    
     objTown.options[objTown.options.length] = new Option ("Unomur Uganda/Rwanda",'199');
    
     objTown.options[objTown.options.length] = new Option ("Unprofor",'188');
    
     objTown.options[objTown.options.length] = new Option ("Unscom/CSG Irak",'197');
    
     objTown.options[objTown.options.length] = new Option ("Untac cambodja",'195');
    
     objTown.options[objTown.options.length] = new Option ("UNTAG",'229');
    
    };
    
   
   
    if (lngCat == 210)
    { objTown.options.length = 0;
     objTown.options[0] = new Option("geen selectie",'210');    


    
     objTown.options[objTown.options.length] = new Option ("AFCENT",'214');
    
     objTown.options[objTown.options.length] = new Option ("AIRNORTH",'228');
    
     objTown.options[objTown.options.length] = new Option ("Centrale organisatie mindef",'211');
    
     objTown.options[objTown.options.length] = new Option ("NORTHAG/TWOATAF",'213');
    
     objTown.options[objTown.options.length] = new Option ("SACEUR",'215');
    
    };
    
   
   
    if (lngCat == 241)
    { objTown.options.length = 0;
     objTown.options[0] = new Option("geen selectie",'241');    


    
     objTown.options[objTown.options.length] = new Option ("DTO",'243');
    
     objTown.options[objTown.options.length] = new Option ("DVVO",'242');
    
     objTown.options[objTown.options.length] = new Option ("DWS",'244');
    
     objTown.options[objTown.options.length] = new Option ("IDL",'253');
    
    };
    
   
   
  };