private void btnChangeViewLogin_Click(object sender, EventArgs e)
{
PanelDangNhap.BringToFront();
HieuUng.Show(PanelDangNhap);
}
private void btnChangeViewRegis_Click_1(object sender, EventArgs e)
{
panelRegister.BringToFront();
HieuUng.Show(panelRegister);
PanelDangNhap.Hide();
}