private void button1_Click(object sender, EventArgs e)
{
string _account = accountTextBox.Text;
string _secret = secretTextBox.Text;
if (_account == "" || _secret == "" || !reg.IsNatural_Number(accountTextBox.Text) || !reg.IsNatural_Number(secretTextBox.Text))
{
MessageBox.Show("帳戶或密碼格式不符！！！");
}
}