var dyn_carsOptionTree = [['34',[['i40','2191'],['Santa Fe','309']]],['51',[['Mazda3','925']]],['63',[['Astra','868']]],['78',[['Alhambra','669'],['Ateca','2589'],['Ibiza','672'],['Leon','673'],['Toledo','676']]],['80',[['Fabia','679'],['Kodiaq','2607'],['Octavia','682'],['Rapid','2364'],['Superb','683']]],['88',[['Avensis','726']]],['93',[['Golf','812'],['Polo','819']]],['94',[['S60','847']]]];
var yearsTree = {"80":{"683":["2016","2014","2017","2013","2010"],"682":["2017","2015","2016","2010","2013","2014","2011"],"2364":["2015","2014","2013"],"2607":["2017"],"679":["2017","2011"]},"78":{"673":["2016","2017"],"676":["2015"],"672":["2017","2014"],"2589":["2017"],"669":["2017"]},"51":{"925":["2014"]},"94":{"847":["2011"]},"88":{"726":["2009"]},"93":{"819":["2017"],"812":["2013"]},"34":{"309":["2014"],"2191":["2013"]},"63":{"868":["2014"]}};
var yearsDefault = ["2017","2016","2015","2014","2013","2011","2010","2009"];

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

}

$(document).ready(function() {

  $('#make_id').change(function() {
    var year_options_html = '<option value="">Any year</option>',
        year_options = [],
        make_id = $(this).val();
    if (make_id != '') {
      $.each(yearsTree[make_id], function(index, value) {
        $.each(value, function (index2, value2) {
          if (year_options.indexOf(value2) == -1) {
            year_options.push(value2);
          }
        });
      });
    }
    else {
      year_options = yearsDefault;
    }
    year_options = year_options.sort().reverse();
    $.each(year_options, function(index, value) {
      year_options_html += '<option value="' + value + '">' + value + '</option>';
    });
    $('#reg_year').html(year_options_html);
  });

  $('#model_id').change(function() {
    var make_id = $('#make_id').val(),
        model_id = $(this).val(),
        year_options_html = '<option value="">Any year</option>',
        year_options = [];
    if (model_id != '') {
      $.each(yearsTree[make_id][model_id], function(index, value) {
        if (year_options.indexOf(value) == -1) {
          year_options.push(value);
        }
      });
      year_options = year_options.sort().reverse();
      $.each(year_options, function(index, value) {
        year_options_html += '<option value="' + value + '">' + value + '</option>';
      });
      $('#reg_year').html(year_options_html);
    }
    else {
      $('#make_id').change(); // initialize make years
    }
  });

});