protected void Page_Load(object sender, EventArgs e)
        {
            HttpCookie uLoginIP = new HttpCookie("uLoginIP");

            try
            {
                var    host      = Dns.GetHostEntry(Dns.GetHostName());
                string IPAddress = (from ip in host.AddressList where ip.AddressFamily == AddressFamily.InterNetwork select ip.ToString()).FirstOrDefault();
                uLoginIP["IPAddress"] = IPAddress;
                Response.Cookies.Add(uLoginIP);
                txtUserID.Focus();
                if (!String.IsNullOrEmpty(Request.QueryString["Logout"]) && Request.QueryString["Logout"].ToString() == "True")
                {
                    HttpCookie veCook = Request.Cookies["uLoginInfo"];
                    if (veCook != null)
                    {
                        veCook.Expires = DateTime.Now.AddHours(-2);
                        Response.Cookies.Add(veCook);
                        Response.Redirect("Default.aspx", false);
                    }
                }
                HttpCookie uLogincook = Request.Cookies["uLoginInfo"];
                if (uLogincook != null)
                {
                    Response.Redirect("Default.aspx", false);
                }
            }
            catch (Exception ex)
            {
                Response.Write("<script LANGUAGE='JavaScript' >alert('Please contact administrator for assistant.')</script>");
                al.WriteErrorLog(ex.Message, "Login FormLoad", "");
            }
            txtUserID.Focus();
        }