public function deleteCalendarEvent($postValues)
	{
	    $calId = null;
	    $calendarTable = $this->getServiceLocator()->get('MelisCalendarTable');
	    $resultEvent = $calendarTable->getEntryById($postValues['cal_id']);
	     
	    if (!empty($resultEvent)){
	         
	        $event = $resultEvent->current();
	         
	        if (!empty($event)){
	            $calId = $calendarTable->deleteById($postValues['cal_id']);
	        }
	    }
	    
	    return $calId;
	}