function setcookie(cname,value,days,domn)
{
   if (days)
   {
      var date = new Date();
      date.setTime(date.getTime()+(days*24*60*60*1000));
      var expires = "; expires="+date.toGMTString();
   }
   else var expires = "";
   if (domn)
      document.cookie = cname+"="+value+expires+"; path=/; domain=" + domn;
   else document.cookie = cname+"="+value+expires+"; path=/;"
}