function mailDecode(emailUser, emailHost, user) {
  var emailStr;
  
  if (emailUser != '') {
    emailStr =  "<a href=\"mailto:"+emailUser+String.fromCharCode(64)+emailHost+"\">"+(user == ''?emailUser+String.fromCharCode(64)+emailHost:user)+"</a>";
    document.write(emailStr);
  }
}