function mailref(user, domain, subject, link) {
   if ( link == null || link.replace(/ /g,"") == "" ) {
      link = user + '@' + domain;
   }
   if ( subject == null || subject.replace(/ /g,"") == "" ) {
      subject="";
   }
   document.write('<span class="mailto"><a class="mailto" href="' + 'mailto:' + user + '@' + domain + '?subject=' + subject + '">' + link + '</a></span>');
}