function setReferrerCookies() {
	// Get the referrer. If this is the first time, then save the
	// referrer in cookies. Otherwise, the referrer will already *be*
	// in cookies, and we'll get it from them.
	referrerWeb = Get_Cookie('referrer_web');
	referrerParam = Get_Cookie('referrer_param');
	if ((referrerWeb == null) && (referrerParam == null)) {
		referrerWeb = document.referrer;
		if ((referrerWeb != null) && (referrerWeb != ''))
			Set_Cookie('referrer_web', referrerWeb, 1, '/', '', '');
		else
			Delete_Cookie('referrer_web', '/', '');

		referrerParam = getQueryParamValue("referrer");
		if ((referrerParam != null) && (referrerParam != ''))
			Set_Cookie('referrer_param', referrerParam, 1, '/', '', '');
		else
			Delete_Cookie('referrer_param', '/', '');
	}
	if (referrerWeb == null)
		referrerWeb = '';
	if (referrerParam == null)
		referrerParam = '';
}