public function setActiveTo($ActiveTo)
 {
     if ($ActiveTo == '0000-00-00 00:00:00') {
         $ActiveTo = $_SESSION['VARIABLES']['EnvPro']['activeTo'];
     }
     if ($ActiveTo == '') {
         $ActiveTo = '0000-00-00 00:00:00';
     }
     $date = new Fecha($ActiveTo, true);
     $this->ActiveTo = $date->getFechaTime();
     unset($date);
 }