function showBlock(showID)
{
  var nlm = document.getElementById(showID);
  if (nlm.style.display=='block') nlm.style.display = 'none';
  else nlm.style.display = 'block';
  showID = showID=='fof' ? 'isis' : 'fof';
  nlm = document.getElementById(showID);
  nlm.style.display = 'none';
}