function readCookie(name) {
  allcookie = document.cookie + ';'
  start1 = allcookie.indexOf(name);
  if (start1 != -1) {
    target = allcookie.substring(start1, allcookie.length);
    start2 = target.indexOf('=', 0) + 1;
    end = target.indexOf(';', start2);
    return(unescape(target.substring(start2, end)));
  }
  return("");
}
//
function writeCookie(name, value) {
  expdays = 1;
  t = new Date;
  t.setTime(t.getTime() + expdays * 24 * 60 * 60 * 1000);
  document.cookie = name + '=' + escape(value) + '; expires=' + t.toGMTString() + '; path=/;';
}
//
function clearCookie(name) {
  if (document.cookie != "") {
    t = new Date;
    t.setTime(t.getTime() - 1 * 24 * 60 * 60 * 1000);
    document.cookie = name + '= ; expires=' + t.toGMTString() + '; path=/;';
  }
}
//
function modch(mod)
{
if ((mod == "")||(mod == 'undefined'))
{
return;
}
var modparase = Date.parse(mod);

dd = new Date();
yy = dd.getYear();
mm = dd.getMonth() + 1;
dd = dd.getDate();
if (yy < 2000) { yy += 1900; }
if (mm < 10) { mm = "0" + mm; }
if (dd < 10) { dd = "0" + dd; }
var nowt = yy + '/' + mm + '/' + dd;
var nowparase = Date.parse(nowt);

var kikan = 7;
var saparase = 86400000 * kikan;

var sakikan = nowparase - modparase;
var modchval = " ";
if (sakikan <= saparase)
{
var modchval = "<span style='font-size:10px;color:#ff0000;'>update!</span>";
}
//document.write("(" + sakikan + " <= " + saparase + ")<br />");
document.write( modchval );

}