public function CrearCombo2Valores($entidad, $secondVal, $displayValue, $selectedId, $Filtro = "")
 {
     if ($Filtro != "") {
         $Filtro = " WHERE " . $Filtro;
     }
     $keyValue = 'id' . $entidad;
     $result = "<select name='combo{$entidad}' id='combo{$entidad}' onchange='javascript:void(comboDependiente{$entidad}());'>";
     if ($selectedId == 0) {
         $result .= "<option value='0' selected></option>";
     }
     $recordset = parent::query("Select * from {$entidad} {$Filtro}");
     while ($records = parent::handle($recordset)) {
         $value = $records->{$displayValue};
         $key = $records->{$keyValue};
         $key2 = $records->{$secondVal};
         if ($key == $selectedId) {
             $result .= "<option value='{$key}#{$key2}' selected>{$value}</option>";
         } else {
             $result .= "<option value='{$key}#{$key2}'>{$value}</option>";
         }
     }
     $result .= '</select>';
     return $result;
 }