protected void AtmAdd_Click(object sender, EventArgs e)
        {
            int billamnt = 0;

            if (AtmbillnameTxtbx.Text != null && AtmbillamntTxtbx.Text != null)
            {
                try
                {
                    billamnt = Convert.ToInt32(AtmbillamntTxtbx.Text);
                }
                catch (FormatException)
                {
                    ClientScript.RegisterStartupScript(this.GetType(), "myalert", "alert('" + "Please enter a valid bill amount." + "');", true);
                }

                db.AddAtmBill(new AtmChecklist(userName, AtmbillnameTxtbx.Text, billamnt));
                refillAtmCheck();
                Atmchkbx.Items.Add(" - " + AtmCheck[AtmCheck.Count - 1].billname + ":  $" + AtmCheck[AtmCheck.Count - 1].billamount);
                Atmchkbx.Items[Atmchkbx.Items.Count - 1].Value = AtmCheck[AtmCheck.Count - 1].id.ToString();
                AtmbillnameTxtbx.Text = "";
                AtmbillamntTxtbx.Text = "";
            }
        }