Jquery计时跳转

 <script type="text/javascript">
        $(document).ready(function () {
            function jump(count) {
                window.setTimeout(function () {
                    count--;
                    if (count > 0) {
                        $('#num').text(count);
                        jump(count);
                    } else {
                        location.href = "index.aspx";
                    }
                }, 1000);
            }
            jump(5);
        });  
    </script>

  <span style="font-size: 14px">页面将在<span id="num">5</span>秒钟后自动跳转。</span>