<?php 
// grid definition see the $obj->display() function
echo Display::grid_js('grade_model', $url, $columns, $column_model, $extra_params, array(), $action_links, true);
?>
});
</script>
<?php 
$obj = new GradeModel();
// Action handling: Add
switch ($action) {
    case 'add':
        if (api_get_session_id() != 0 && !api_is_allowed_to_session_edit(false, true)) {
            api_not_allowed();
        }
        $url = api_get_self() . '?action=' . Security::remove_XSS($_GET['action']);
        $form = $obj->return_form($url, 'add');
        // The validation or display
        if ($form->validate()) {
            if ($check) {
                $values = $form->exportValues();
                $res = $obj->save($values);
                if ($res) {
                    Display::display_confirmation_message(get_lang('ItemAdded'));
                }
            }
            $obj->display();
        } else {
            echo '<div class="actions">';
            echo '<a href="' . api_get_self() . '">' . Display::return_icon('back.png', get_lang('Back'), '', ICON_SIZE_MEDIUM) . '</a>';
            echo '</div>';
            $form->addElement('hidden', 'sec_token');