if (document.referrer) {
var expdate = new Date();
expdate.setTime(expdate.getTime() +  (24 * 60 * 60 * 1000 * 365)); 
setCookie("RFSReferrer", document.referrer, expdate);
}

function setCookie (name, value, expires) {
        if (!expires) expires = new Date();
document.cookie = name + "=" + escape (value) + 
"; expires=" + expires.toGMTString() +  "; path=/";
}