function email(user,domain,label,link) {
  var address = user+'@'+domain;
  var toWrite = '';
  if (link > 0) {toWrite += '<a href="mailto:'+address+'">';}
  if (label != '') {toWrite += label;} else {toWrite += address;}
  if (link > 0) {toWrite += '</a>';}
  document.write(toWrite);
}