function wt_fsr () {
	if (typeof(wt_getCookie) == 'undefined') return '';
	var r = document.referrer;
	if (!document.layers && document.getElementById) {
		eval ("try {r=top.document.referrer;}catch(e){};");
	} else {
		r=top.document.referrer;
	}
	if ( wt_getCookie(r.toLowerCase())=='' ){
		wt_setCookie(r.toLowerCase(),1);
		return r;
	}
	return '';
}
webtrekk.framesetReferrer = wt_fsr();