// JavaScript Document
kikan=20;
icon="<img src='http://www.vegahouse.biz/img/icon_new.jpg' />";
today=new Date();
upday=new Date();
function koushin(y, m, d) {
   upday.setFullYear(y);
   m = m - 1;
   upday.setMonth(m);
   upday.setDate(d);
   difference = today.getTime() - upday.getTime();
   difference = Math.floor(difference / (1000 * 60 * 60 * 24));
   if (difference < kikan) {
      document.write(icon);
   }
}