try
        {
            if (Session["UserLev"].ToString().Trim() != "1")
            {
                Response.Write("<script>javascript:alert('对不起，您无权该操作!');</script>");
                Response.End();
            }
        }
        catch
        {
            Response.Write("<script>javascript:parent.location.href = '../Not_logon.htm';</script>");
        }