public function view($container = NULL, $klank = NULL, $type = NULL) {
 
             $html = Loader::helper('html');
             $ch = Loader::helper('container');
 
             Loader::model('container_list');
             Loader::model('container');
             Loader::model('attribute_list');
             Loader::model('attribute/type');
             Loader::model('attribute/categories/collection');
 
             $ak = CollectionAttributeKey::getByHandle('klank');
 
             if (empty ($container) && empty ($klank) && empty ($type) ){
                 $this->task = "overview";
 
                 $this->set('alphabet', $ch->getSelectOptions($ak));
 
                 return;
             }
 
             if ($ch->isInSelectOptions($ak, $container)){
                 $containerList = new ContainerList();
                 $this->set('containerlist', $containerList->getPage());
                 $this->set('klank', strtoupper($container));
             } else {
                 if ($ch->isInSelectOptions($ak, $klank)) {
                     $container_obj = new Container();
                     $container_obj = Container::getByName($container);
 
                     $_display = $container_obj->getPageByKlank($klank, 
$type);
 
                     $this->render($_display);
                 } else {
                     $this->redirect('/materiaal');
                 }
             }
     }