function emaillink(pstrName,pstrDomain,pstrExtra,pstrDisplay) {
  document.write('<a href="mailto:' + pstrName + '@' + pstrDomain + pstrExtra + '">');
  if (pstrDisplay=="") {
    document.write(pstrName + '@' + pstrDomain + '</a>');
  }
  else {
    document.write(pstrDisplay + '</a>');
  }
}