Listing 2: The getLastLogonTimestamp Function

function getLastLogonTimestamp(accountDN, result) {
  var lastLogonLargeInteger, lowPart, highPart, intervals,
    lastLogonTimestamp;

  account = GetObject("LDAP://" + accountDN);
  try {
    lastLogonLargeInteger = account.Get("lastLogonTimestamp");
    lowPart = toUnsigned(lastLogonLargeInteger.LowPart);
    highPart = toUnsigned(lastLogonLargeInteger.HighPart);
    intervals = (highPart * Math.pow(2, 32)) + lowPart;
    lastLogonTimestamp = new Date(Date.UTC(1601, 0, 1, 0, 0, 0,
      intervals / 10000));
  }
  catch(err) {
    lastLogonTimestamp = new Date(0);
  }

  result.lastLogonTimestamp = lastLogonTimestamp;
}