gistfile1.js

add_hook("buffer_loaded_hook",
  function (buffer) {
    if (! buffer instanceof content_buffer)
      return;

    if (/\/\/thread\.gmane\.org/.test(buffer.display_uri_string)) {
      for (var frame in frame_iterator(buffer.top_frame)) {
        frame = buffer.top_frame.frames[0];
        if (frame.name != 'threads')
          continue;
        var link;
        frame.document.getElementsByTagName("a").forEach(function(href){
                                                           var el = frame.document.getElementsByClassName("focused")[0];
                                                           if (! el)
                                                             return;
                                                           if (el.nextElementSibling) {
                                                             link = el.nextElementSibling.getElementsByTagName("a")[0];
                                                             if (link)
                                                               link.rel += " next";
                                                           }
                                                           if (el.previousElementSibling) {
                                                             link = el.previousElementSibling.getElementsByTagName("a")[0];
                                                             if (link)
                                                               link.rel += " prev";
                                                           }
                                                           if ((!el.nextElementSibling) && (!el.previousElementSibling)) {
                                                             href.rel = '';
                                                           }
                                                         });
      }
    }  
  });