function writeemail(nm,dm,dp) {
  var name = nm;
  var domain = dm;
  var display = dp;
  document.write('<a href=\"mailto:' + name + '@' + domain + '\">');
  if (display=='') {
    document.write(name + '@' + domain + '</a>');
  }
  else {
    document.write(display + '</a>');  
  }
}

function validemail(theform) {
  var email=theform.user.value;
  var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
  if (filter.test(email))
    return true;
  else {
    alert("Please enter a valid email address");
    return false;
  }
}