private void toolNominaNormal_Click(object sender, EventArgs e)
 {
     frmSeleccionPeriodo sp = new frmSeleccionPeriodo();
     sp._TipoNomina = GLOBALES.NORMAL;
     sp.MdiParent = this;
     sp.StartPosition = FormStartPosition.CenterScreen;
     sp.Show();
 }
 private void toolExtraordinario_Click(object sender, EventArgs e)
 {
     frmSeleccionPeriodo sp = new frmSeleccionPeriodo();
     sp._TipoNomina = GLOBALES.EXTRAORDINARIO_NORMAL;
     sp.MdiParent = this;
     sp.Show();
 }