gistfile1.js

$.widget("ui.choose_your_needs", {
        _init: function() {
            var $el= this.element;

            $el.find("#need-groups .need-group-box").need_group_box();

            $el.find("#next-step").click(function() {
                    var json= [];
                    $el.find("[name=need_id]:checked").each(function() {
                            json.push($(this).val());
                        });
                    $.post("/cyn/choose-your-needs", {nsbg: $.toJSON(json)}, function(data) {
                            if (data==[]||data=="") { // it gets [] but parses as "", dunno why                                                                                   
                                $el.trigger("next-step");
                            }
                        });
                });
        }
    });

$.widget("ui.cyn", {
        _init: function() {
            var self= this;
            var $el= this.element;
            this._load_current_step();

            $(".cyn-step").live("reload", function() {
                    self._load_step($(this).attr("id"));
                        });

            $("#next-step").live("click", function() {
                    self._next_step();
                });

 ....

       _next_step: function() {
            this._load("/cyn/next-step?current_step=\""+this._current_step().replace("cyn-","")+"\"");
        },
...

})