function unmask(who) {
	var el=document.getElementById(who);
	var i = 0;
	var mail = "";
	var domain = "greep";

	switch(who) {
		default: mail = who; break;
	}

	el.setAttribute('href',"mailto:" + mail + "@" + domain + ".cz");
	el.setAttribute('title', mail + "@" + domain + ".cz");
}