function setup_new_makes() {
  var make_array = new Array();
  for (var make in new_data) {
    make_array.push(make);
  }
  for (var make in make_array.sort()) {
    jQuery('#new_makes').append('<option value="'+make_array[make]+'">'+make_array[make]+'</option>');
  }
}

function setup_used_makes() {
  var make_array = new Array();
  for (var make in used_data) {
    make_array.push(make);
  }
  for (var make in make_array.sort()) {
    jQuery('#used_makes').append('<option value="'+make_array[make]+'">'+make_array[make]+'</option>');
  }
}

function setup_new_models(make) {
  jQuery('#new_models').empty();
  jQuery('#new_models').append('<option value="all">Select A Model</option>');
  for (var model in new_data[make]) {
    jQuery('#new_models').append('<option value="'+new_data[make][model]+'">'+new_data[make][model]+'</option>');
  }
}

function setup_used_models(make) {
  jQuery('#used_models').empty();
  jQuery('#used_models').append('<option value="all">Select A Model</option>');
  for (var model in used_data[make]) {
    jQuery('#used_models').append('<option value="'+used_data[make][model]+'">'+used_data[make][model]+'</option>');
  }
}

setup_new_makes();
setup_used_makes();