//внешний referrer превращаем в куку
if(document.referrer){
    var aCookie = document.cookie.split("; ");
    var setrefcookie = true;
    for (var i=0; i < aCookie.length; i++){
	var aCrumb = aCookie[i].split("=");
	if("referer" == aCrumb[0] && aCrumb[1] != "" && aCrumb[1] != "undefined" && aCrumb[1] != "deleted"){ 
	    setrefcookie = false; break;
	}
    }
    if(setrefcookie){ document.cookie = "referer="+escape(document.referrer)+";"; }
}