jquerys

selects.js

          $('#model').change(function(){
            var model = $('#marca option:selected').val();
            var marca = $('#marca option:selected').val();
            $.ajax({
              url: 'http://quatrorodas.abril.com.br/compre-seu-carro/static/javascripts/price-table-years',
              data: { make: marca, model: model, domain: "carro" },
              success: function(data){
                // monta os options com a var data
              }
            });
          });