jquery json example

sssss.js

      $(document).ready(function(){
          $('#marca').change(function(){
            var marca = $('#marca option:selected').val();
            $.getJSON('static/javascripts/models/models?marca', function(json){
              var items = '';				  
              $.each(json, function(idx,value) {                
                if(marca == value['make']){
                  items += '<option value="' + value['model'] + '">' + value['model'] + '</option>';
                }
              });

            $('#model').html(items);
            });
          });
      });