function showAddress(user, domain, linkText, linkClass) {
	if (domain == '') {
		domain = "ndcl.org";
	}
	var addr = user + String.fromCharCode(64) + domain;
	if (linkText == '') {
		linkText = addr;
	}
	if (linkClass != '') {
		linkClass = " class='" + linkClass + "'";
	}
    var result = ("<a href='" + "mail" + "to:" + addr + "'" + linkClass + ">" + linkText + "</a>");
    return result;
}