<ul id="ulcomment"></ul>
    <table>
        <tr><td><a href="" id="p1">1</a></td></tr>
    </table>
    <script type="text/javascript">
        $("#p1").click(function (e) {
            $.post("/Paging/Ajax_paging", {action: "getCount", pagenum: "1" }, function (data, static) {
               ........
            });
        });
    </script>

 public int Ajax_paging(string action, string pagenum)
        {
            string action_sp = Request["action"];
            if (action_sp == "getCount")
            {
                  .........................
            }
            else 
            {
                string pagenum_sp = Request["pagenum"];
               ..............................
            }
        }