public function setShow($show)
    {

        if($show == 'unavailable') {
            $this->setType($show);
        }

        $node = $this->getShow(false);
        if(!$node){
            $node = $this->createElement('show');
            $this->doc->appendChild($node);
        }

        $node->nodeValue = htmlspecialchars($show);

    }