function get_domain() {
	var domain = document.domain;
	var pos = domain.indexOf(".");
	return domain.substring(pos+1); 
}

function get_referrer() {
	return document.referrer;
}

function get_url() {
	return document.URL;
}

function get_tail() {
	var url = document.URL;
	var parts = url.split("/");
	return unescape( parts[parts.length-2] );
}