function addToLinks(urlstr) {
	var arg = urlstr;
	var rloc = arg.indexOf('r=');
	if (rloc !== -1) {
		var referrer = arg.substr(rloc + 2);
		var rString = '?r=' + referrer;
		var themax = document.links.length;
		for (var i = 0; i < themax; i++) {
			var url = document.links[i];
			var urlr = url + rString;
			document.links[i].href = urlr;
		}
	} 
}