function setcookie(name, value, expiry, path, domain) {
  if (expiry) {
    var now = new Date();
    now.setTime(now.getTime() + Math.round(86400000 * expiry));  //  in days
  }
  document.cookie = name + '=' + escape(value) +
    (expiry ? '; expires=' + now.toGMTString() : '') +
    (path ? '; path=' + path : '') +
    (domain ? '; domain=' + domain : '');
}

function getcookie(name) {
  name += '=';
  var cookies = document.cookie, i = cookies.indexOf(name), j, start, end;
  if (i < 0) { return null; }
  start = i + name.length;
  end = cookies.substring(start);
  j = end.indexOf(';');
  end = j < 0 ? cookies.length : start + j;
  return unescape(cookies.substring(start, end));
}