function GCookieVal (offset) {
 var endstr = document.cookie.indexOf (";", offset);
   if (endstr == -1)
      endstr = document.cookie.length;
   return unescape(document.cookie.substring(offset, endstr));
}
function GCookie(NameOfCookie){
    if (document.cookie.length > 0) {
    begin = document.cookie.indexOf(NameOfCookie+"=");
    if (begin != -1) {
      begin += NameOfCookie.length+1;
      end = document.cookie.indexOf(";", begin);
      if (end == -1) end = document.cookie.length;
        return unescape(document.cookie.substring(begin, end));
    }
  }
  return null;
}

function SCookie(NameOfCookie, value, expiredays) {
var ExpireDate = new Date ();
ExpireDate.setTime(ExpireDate.getTime() + (expiredays * 24 * 3600 * 1000));

  document.cookie = NameOfCookie + "=" + escape(value) +
  ((expiredays == null) ? "" : "; expires=" + ExpireDate.toGMTString());
}