Jquery - chosen + Ajax

$(function(){
    console.log('hello');
    var country = $('#id_country').change(setStates);
    var state = $('#id_state').change(setCity);

    //Saber que formulario estamos utilizando
    if ($('#id_city').length){
        var city = $('#id_city');
    } else {
        var city = $('#id_id');
    }
    //Asignar clase de chozen
    state.addClass('chzn-select');
    city.addClass('chzn-select');
    //Validacion despues de haber realziado una busqueda
    if(state.find('option:selected').val().length !== 0 ){
        state.chosen();
    }
    if(city.find('option:selected').val().length !== 0 ){
        city.chosen();
    }
    //Cargar estados de los paises
    function setStates(){
        var value = $(this).find('option:selected').val();
        var url = url_states_by_country;
        //Selecciono opcion valida
        if (value !== undefined && value.length !== 0) {
            url=url.replace("0",value);
        } else {
            state.empty();
            city.empty();
            state.trigger("liszt:updated");
            city.trigger("liszt:updated");
            return;
        }
        $.ajax({
                url: url,
                dataType:'json',
                success : function(data){
                    state.trigger("liszt:updated");
                    state.empty();
                    state.append("<option value=''>--------------</option>");
                    city.empty();

                $.each(data['result'],function(i, value){
                state.append("<option value="+value[0]+">"+value[1]+"</option>");
                });
            },
            complete : function(){
                //Actualizacion e inicializacion de chosen
                state.trigger("liszt:updated");
                city.trigger("liszt:updated");
                state.chosen();
                }
            });

    };
    //Cargar las ciudades de el estado seleccionado
    function setCity(){
        console.log("entro");
        city.trigger("liszt:updated");
        var value = $(this).find('option:selected').val();
        var url = url_city_by_states;
        //Selecciono opcion valida
        if (value !== undefined) {
            url=url.replace("0",value);
        }
        $.ajax({
            url : url,
            dataType : 'json',
            success : function(data){
                city.empty();
                city.append("<option value=''></option>");
                $.each(data['cities'],function(i, value){
                    city.append("<option value="+value['id']+">"+value['name']+"</option>");
                });
        },
        complete : function(){
            //Actualizacion e inicializacion de chosen
            city.trigger("liszt:updated");
            city.chosen();
            }
        });
    }
});