function mailLoginFormImapUserOnChange() {
  if ( (document.getElementById) ) {
/*
    mailLoginForm = document.getElementById("webmail-login-form").getElementsByTagName("input");
    found = false;
    for (i=0; (found == false) && (i < mailLoginForm.length); i++) {
      if (mailLoginForm.item(i).attributes.getNamedItem("name").nodeValue=="imapuser") {
        mailLoginForm = mailLoginForm.item(i);
        found = true;
      }
    }
*/
    found = true;
    mailLoginForm = document.getElementById("webmail-login-form").imapuser;
    if (found && ("" + mailLoginForm.value).indexOf("@") == -1) {
        dominio = document.domain;
        pos = dominio.lastIndexOf(".");
                dominio = "portugalmail" + dominio.slice(pos);

                mailLoginForm.value += "@" + dominio;
    }
  }
}