how to code in ajax to delete a record or insert

[WebMethod]
   public static void DeleteRec(string DeleteRecord1)
   {
       SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["strcon"].ConnectionString);
       if (con.State == ConnectionState.Closed)
       {
           con.Open();
       }
       SqlCommand cmd = new SqlCommand("delete from tbl_Login where userID=2", con);
       cmd.ExecuteNonQuery();


       return;

   }

<script>
        function DeleteRec(DeleteRecord1) {
            $.ajax({
                type: "POST",
                url: "frmNewRegisteration.aspx/DeleteRec",
                data: '{DeleteRecord1: ' + DeleteRecord1 + '}',
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function () {
                    alert("delete succesful");
                },
                error: function (response) {
                    alert("unable to delete");
                }
            });
        };

        </script>