function WriteCookie(cookiename, cookieval)
{
    var todayDate = new Date(); 
    expiredays='10'; 
    todayDate.setDate(todayDate.getDate() + expiredays);
    document.cookie = cookiename + "=" + escape(cookieval)+"; expires="+todayDate.toGMTString()+"; path=/;";
}

function ReadCookie(cookiename) {
   var aCookie = document.cookie.split("; ");
   for (var i=0; i < aCookie.length; i++)
   {
      var aCrumb = aCookie[i].split("=");
      if (cookiename == aCrumb[0]) 
          return unescape(aCrumb[1]);
   }
   return (null);
}