public function listadousuariosajaxAction()
 {
     $this->verificarInactividad();
     $this->_helper->layout->disableLayout();
     $usuarios = new Application_Model_Usuario();
     $listausuarios = $usuarios->listarUsuarios();
     $paginator = new Zend_Paginator(new Zend_Paginator_Adapter_Array($listausuarios));
     $this->view->nroreg = $this->getRequest()->getParam('nroreg');
     if ($this->view->nroreg == null) {
         $this->view->nroreg = 2;
     }
     $paginator->setItemCountPerPage($this->view->nroreg);
     $paginator->setCurrentPageNumber($this->_getParam('page'), 1);
     $this->view->paginator = $paginator;
 }