public static function addJSgroup($group)
{
if (is_array($group)) {
Mtpl::$_jsgroups = array_merge(Mtpl::$_jsgroups, $group);
} else {
Mtpl::$_jsgroups[] = $group;
}
Mtpl::$_jsgroups = array_unique(Mtpl::$_jsgroups);
}
