static S ai_html_webThumbUpDownLinks(S webID) {
  bool authed = webAuthed();
  S imgUp = hsnippetimg(#1000223), imgDown = hsnippetimg(#1000224);
  S textUp = "Web " + webID + " is correct";
  S textDown = "Web " + webID + " is invalid";
  if (authed)
    ret ahref("/?input=" + urlencode(textUp), imgUp) + " "
      + ahref("/?input=" + urlencode(textDown), imgDown);
  else
    ret html_chatPostLink(textUp, imgUp) + " "
      + html_chatPostLink(textDown, imgDown);
}