function csVerifyEmail(aEmail)
  {
  // http://www.regular-expressions.info/email.html
  var filter = /[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?/;
  if (!filter.test(aEmail))
    return false;
  return true;
  }