modDate = new Date(document.lastModified);

  year = modDate.getYear();
  minute = modDate.getMinutes();
  second = modDate.getSeconds()

  if(modDate.getYear() < 2000) year += 1900;
  if(year < 1950) year += 100;

  if(modDate.getMinutes() < 10) minute = "0" + minute;
  if(modDate.getSeconds() < 10) second = "0" + second;

  document.write("<p class=\"small\">最終更新日：",year,"年",modDate.getMonth() + 1,"月",modDate.getDate(),"日</p>");