var dyn_carsOptionTree = [['3',[['156','10']]],['7',[['A6','45']]],['10',[['5 Series','87']]],['15',[['300C','1138']]],['16',[['Berlingo','136'],['C4','909'],['Grand C4 Picasso','2204']]],['205',[['Duster','2362'],['Sandero','2363']]],['25',[['Doblo','225'],['Punto','229']]],['26',[['C-Max','1218'],['Fiesta','252'],['Focus','253'],['Ka','257'],['Kuga','1391'],['Model A','2456'],['Mondeo','259'],['Transit Connect','1227']]],['34',[['i10','1301'],['i30','1286'],['i40','2191'],['ix20','2168'],['ix35','2138'],['Santa Fe','309'],['Tucson','983']]],['39',[['Rio','339'],['Venga','2135']]],['51',[['Mazda3','925']]],['53',[['E Class','448'],['GLE Class','2574'],['S Class','451'],['SLK Class','455']]],['58',[['Space Star','497']]],['61',[['Micra','521'],['NV300','2614'],['Qashqai','1145']]],['63',[['Astra','868'],['Corsa','871'],['Insignia','1405'],['Meriva','873']]],['67',[['2008','2386'],['208','2230'],['3008','1457'],['406','558'],['508','2182'],['Expert','1201'],['Partner','1222']]],['72',[['Captur','2400'],['Clio','612'],['Fluence','2169'],['Kangoo','617'],['Megane','619']]],['78',[['Ibiza','672']]],['80',[['Fabia','679'],['Octavia','682']]],['82',[['Korando','691']]],['85',[['Celerio','2469']]],['88',[['Avensis','726'],['Corolla','730'],['Verso','2142']]],['92',[['Astra','785'],['Vectra','802'],['Zafira','805']]],['93',[['Caddy','964']]]];
var dispmods = ["10","45","87","1138","136","909","2204","2362","2363","225","229","1218","252","253","257","1391","2456","259","1227","1301","1286","2191","2168","2138","309","983","339","2135","925","448","2574","451","455","497","521","2614","1145","868","871","1405","873","2386","2230","1457","558","2182","1201","1222","2400","612","2169","617","619","672","679","682","691","2469","726","730","2142","785","802","805","964"];

function populateTarget(name,triggerObj,targetObj,emptyText) {

  eval ('tree = ' + name + 'OptionTree')

  triggerValue = getValue(triggerObj)
  
  for (i=0;i<tree.length;i++) {

    if (tree[i][0]==triggerValue) {
      break
    }

  }

  empty(targetObj)

  newOption = new Option()
  newOption.text = emptyText;

  newOption.value = ""
  targetObj.options[targetObj.options.length] = newOption

  if (i<tree.length) {

    options = tree[i][1]
    selectThisOption = 0

    for (i=0;i<options.length;i++) {

      newOption = new Option()
      newOption.text = options[i][0]
      newOption.value = options[i][1]
      targetObj.options[targetObj.options.length] = newOption

    }

    targetObj.options.length = options.length + 1;
  }

}

function empty(select) {

  select.options.length = 0

}

function getValue(formObj) {

  value = null

  if (formObj.options) { // select

    if (formObj.selectedIndex > -1)
      value = formObj.options[formObj.selectedIndex].value

  } else {

    if (formObj.length) { // radio
      for (var b = 0; b < formObj.length; b++)
        if (formObj[b].checked)
          value = formObj[b].value
    }
    else if (formObj.checked) // checkbox
      value = formObj.value

  }

  return value

}

function initSearch() {

  var id_extra = '';
  if (!document.getElementById) return false;
  if (!document.getElementById('make')) {
    if (!document.getElementById('make_id')) {
      return false;
    }
    else {
      id_extra = '_id';
    }
  }
  var makeSelect  = document.getElementById('make' + id_extra);

  // register change event
  makeSelect.onchange = function() {
    populateTarget('dyn_cars',this, document.getElementById('model' + id_extra), 'Model')
  }

  populateTarget('dyn_cars', makeSelect, document.getElementById('model' + id_extra), 'Model');
  
  var patt = /model_id=([0-9]+)/;
  if (patt.test(window.location.search)) {
    var selected_model = patt.exec(window.location.search);
    selected_model = selected_model[1];
    document.getElementById('model' + id_extra).value = selected_model;
  }

}

$(document).ready(function(){
  initSearch();
});