modate = new Date(document.lastModified);
  year = modate.getYear();
  if (year < 80)
    year += 2000;
  else if (year >= 80 && year < 200)
    year += 1900;
  mon = modate.getMonth()+1;
    if (mon < 10)
     mon = "0"+mon;
  dat = modate.getDate();
  if (dat < 10)
    dat = "0"+dat;
  resu = "update: "+dat+"-"+mon+"-"+year;
  document.write(resu);