function newmark(yymmdd) {
  delDay1 = 7;
  delDay2 = 14;
  delDay3 = 21;
  oldDay = new Date(yymmdd);
  newDay = new Date();
  d =(newDay - oldDay) / (1000 * 24 * 3600);
  if(d <= delDay1) {
    document.write("<IMG src='http://mydepa.fc2web.com/mydepa_new.gif' border='0'>");
  }
  else if(d <= delDay2) {
    document.write("<IMG src='http://mydepa.fc2web.com/mydepa_up.gif' border='0'>");
  }
  else if(d <= delDay3) {
    document.write("<IMG src='http://mydepa.fc2web.com/mydepa_topic.gif' border='0'>");
  }
}