private void arrivalTimeToolStripMenuItem_Click(object sender, EventArgs e)
        {
            frmArrivalTime ob = new frmArrivalTime();

            ob.Show();
            this.Hide();
        }
        private void button3_Click(object sender, EventArgs e)
        {
            frmArrivalTime obb = new frmArrivalTime();

            obb.Show();

            this.Hide();
        }