public function getSearchedVersions()
    {
        $versions = array();
        
        if (!empty($_REQUEST['Versions'])) {
            if (is_array($_REQUEST['Versions'])) {
                $versions = Convert::raw2att($_REQUEST['Versions']);
                $versions = array_combine($versions, $versions);
            } else {
                $version = Convert::raw2att($_REQUEST['Versions']);
                $versions[$version] = $version;
            }
        }

        return $versions;
    }