Extension:Gadgets/Scripts/UserRights.js

/** userRights (for Bureaucrats only) **/
addOnloadHook( function() {
        if ( wgNamespaceNumber != 2 && wgNamespaceNumber != 3 ) { // User or User talk
                return;
        }
        var user = wgTitle.split( '/' )[0];
        var url = wgScript + '?title=Special:UserRights&user=' + encodeURIComponent( user );
        addPortletLink( 'p-tb', url, 'User rights', 't-userrights', 'List of user groups for ' + user );
});