Jquery幾秒自動跳轉

 $(document).ready(function() {    

            function jump(count) {    

                window.setTimeout(function(){    

                    count--;    

                    if(count > 0) {    

                        $('#num').attr('innerHTML', count);    

                        jump(count);    

                    } else {    

                        location.href="login.jsp";    

                    }    

                }, 1000);    

            }    

            jump(3);    

        });