anchor.diff:  
   <% if (webManager.getMultiUserChatManager().getMultiUserChatServicesCount() > 1) { %>
   -- <fmt:message key="muc.room.summary.service" />:
  -    <select name="mucname" onchange="location.href='muc-room-summary.jsp?mucname=' + this.options[this.selectedIndex].value;">
  +    <select name="mucname" id="mucname" onchange="location.href='muc-room-summary.jsp?mucname=' + this.options[this.selectedIndex].value;">
   <% for (MultiUserChatService service : webManager.getMultiUserChatManager().getMultiUserChatServices()) {
       if (service.isHidden()) {
           // Private and hidden, skip it.
  
positive.code:         .collect(Collectors.toList());
  
      // paginator vars
      final ListPager<String> listPager = new ListPager<>(request, response, names, mucname);
  %>
  <html>
      <head>
  
negative.code:         <p><fmt:message key="global.pages" />: [ <%=listPager.getPageLinks() %> ]</p>
  <%  } %>
  
  <%=listPager.getJumpToPageForm()%>
  
  <script type="text/javascript">
      <%=listPager.getPageFunctions()%>
  </script>
      </body>
  </html>
  