private void btHome_Click(object sender, EventArgs e)
        {
            Form1_Personal_info f = Form1_Personal_info.GetInstance;

            f.Show();    //go to Home page
            this.Hide(); //Hide curent window form
        }
        private void btContinue_Click(object sender, EventArgs e)
        {
            Form1_Personal_info f = Form1_Personal_info.GetInstance;

            f.Show();
            this.Hide();
        }