jquery插件开发之实现google+圈子选择功能

                        break;
                    case 38:
                        e.preventDefault();
                        Action.move(‘up’);
                        break;
                    case 40:
                        e.preventDefault();
                        Action.move(‘down’)
                        break;
                    case 9:
                    case 13:
                        e.preventDefault();
                        Action.choose(pull.find(‘.’+cls));
                        break;
                    default:
                        $.noop();
                }
            }
        });
        //点击非当前区域隐藏弹出层
        main.click(function(e){
            e.stopPropagation();
        });
        $(document).click(function(){
           Action.hide();