public static function addChat($IDParent, $Type, $Tag, $Text, $IDUser = null)
 {
     $IDChat = parent::addChat($IDParent, $Text, $IDUser);
     $TheChat = new self();
     $Data = array('Tag' => $Tag, 'Type' => $Type);
     return $TheChat->update($Data, "IDChat = '{$IDChat}'");
 }
 /**
  * @static
  * @param int $interval
  */
 public static function setInterval($interval)
 {
     self::$_interval = (int) $interval;
 }