var uri = new String(document.location);
if (uri.match(/\/\?$/)) {
  var id = document.evaluate("/html/body/table`[@id='titlebar-bottom']/tbody/tr/td`[1]/span/a`[1]", document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null).snapshotItem(0).innerHTML;
  id = parseInt(id);
  if (id != 11911) {
    uri = uri.replace(/\?/,"?node_id=" + id);
    document.location = uri;
  }
}