(function ($) {
    $.fn.selectChain = function (options) {
        var defaults = {
            key: "id",
            value: "label"
        };
        var settings = $.extend({}, defaults, options);
        if (!(settings.target instanceof $)) settings.target = $(settings.target);
        return this.each(function () {
            var $$ = $(this);

            $$.change(function () {
                var data = null;
                if (typeof settings.data == 'string') {
                    data = settings.data + '&' + this.name + '=' + $$.val();
                } else if (typeof settings.data == 'object') {
                    data = settings.data;
                    data[this.name] = $$.val();
					data['extra']=$(settings.data.element).val();
					//console.log('extra: ', data['extra']);
                }

                settings.target.empty();

                $.ajax({
                    url: settings.url,
                    data: data,
                    type: (settings.type || 'get'),
                    dataType: 'json',
                    success: function (j) {
                        var options = [], i = 0, o = null;

                        for (i = 0; i < j.length; i++) {
                            // required to get around IE bug (http://support.microsoft.com/?scid=kb%3Ben-us%3B276228)
                            o = document.createElement("OPTION");
                            o.value = typeof j[i] == 'object' ? j[i][settings.key] : j[i];
                            o.text = typeof j[i] == 'object' ? j[i][settings.value] : j[i];
                            settings.target.get(0).options[i] = o;
                        }

                      // hand control back to browser for a moment
                      setTimeout(function () {
                          settings.target.find('option:first').attr('selected', 'selected').parent('select').trigger('change');
                      }, 0);
                    },
                    error: function (xhr, desc, er) {
                        // add whatever debug you want here.
						alert("ocorreu um erro:["+xhr+"]"+desc);
                    }
                });
            }); // change
        }); // return
    }; // fn.selectChain
})(jQuery); // main function