<aclass="btn btn-success"id="join-btn"href="<?phpecho$contextRoot;?>?action=join"title="Perform an additional login to join your identities"data-toggle="tooltip"data-placement="bottom">
<aclass="btn btn-success disabled"id="join-btn"href="<?phpecho$contextRoot;?>?action=join"title="Perform an additional login to join your identities"data-toggle="tooltip"data-placement="bottom">