public function parseXml($node)
    {
        foreach ($node->childNodes as $item) {
            switch ($item->nodeName) {
                case "day_entry":
                    $this->_dayEntry = new DayEntry();
                    $this->_dayEntry->parseXml( $node );
                break;
                case "hours_for_previously_running_timer":
                    $this->_hoursForPrevious = $item->nodeValue;
                break;
                default:
                break;
            }
        }
    }