setInterval做定时器

 <script src="/js/jquery-1.8.3.min.js"></script>
        <script>
            $(function () {
                setInterval(time, 1000);//一秒
            });
            var count = 4;
            function time() {
                $("#time").text(count); //修改页面
                if (count == 0) {
                    clearInterval();
                    window.location = "跳转页面";
                    return;
                }
                count--
            }
        </script>

 <div style="text-align: center;">
            <a id="time" style="color: red">5</a>秒后自动跳转我的订单
        </div>