function newCheck(y, m, d) {
  delDay = 30; // 何日後に削除するか
  oldDay = new Date(y + "/" + m + "/" +d);
  newDay = new Date();
  d =(newDay - oldDay) / (1000 * 24 * 3600);
  if(d <= delDay) {
  	document.write("&nbsp;<img src=http://seisen.info/kagoshima/images/new.gif border=0>");
  }
}