public static function createMessage($Receivers, $Text, $Sender = null)
 {
     if (!isset($Sender)) {
         $Sender = Zend_Auth::getInstance()->getIdentity()->IDUser;
     }
     $Data = array('IDSender' => $Sender, 'Text' => $Text, 'Date' => new Zend_Db_Expr('NOW()'), 'DateLastMessage' => new Zend_Db_Expr('NOW()'));
     $Message = new self();
     $IDMessage = $Message->insert($Data);
     $Data = array('IDParent' => $IDMessage, 'IDLastMessage' => $IDMessage);
     $Message->update($Data, "IDMessage = '{$IDMessage}'");
     if (!in_array($Sender, $Receivers)) {
         array_push($Receivers, $Sender);
     }
     Zwe_Model_MessageReceiver::insertReceivers($IDMessage, $Receivers);
 }