protected void btmSubmit_Click(object sender, EventArgs e)
        {
            // instantiate clsDataLayer object for access to methods //
            clsDataLayer c = new clsDataLayer();

            // check if form is posting back to Register page //
            if (IsPostBack)
            {
                lblRegistrationSuccess.Visible = true;
            }
            else
            {
                lblRegistrationSuccess.Visible = false;
            } /* end if (IsPostBack) */



            if (c.customerLogin(txtEmail.Text, txtPassword.Text))
            {
                int sessionID = c.getSessionID(txtEmail.Text);
                Session["CustomerID"] = sessionID;
                Response.Redirect("~/Customers/CustomerPortal.aspx");
            }

            {
                // //
                lblLoginError.Text = "Incorrect username/password";
            }
        } /* end btmSubmit_Click() */