iq.setIQ(null, XmppQuery.TYPE_SET, id());
Element query = iq.setQuery("jabber:iq:private");
Element prefsElement = iq.getDoc().createElement("ijab");
prefsElement.setAttribute("xmlns", "ijab:prefs");
prefsElement.appendChild(DOMHelper.textTag(iq.getDoc(), "showOnlineOnly", TextUtils.bool2str(iJabPrefs.instance().showOnlineOnly)));
query.appendChild(prefsElement);
send(iq);
}