if (document.referrer)
{
  var date = new Date();
  date.setTime (date.getTime()+ (30*24*60*60*1000));
  if (document.cookie.indexOf ('1stReferrer') == -1)
  {
    document.cookie = "1stReferrer=" + document.referrer + "; " + date.toGMTString () + "; path=/";
    document.cookie = "1stReferrerTime=" + date.toGMTString () + "; " + date.toGMTString () + "; path=/";
  }
  document.cookie = "LastReferrer=" + document.referrer + "; expires=" + date.toGMTString () +"; path=/";
}