private void AddJourneyStation_Click(object sender, EventArgs e)
        {
            if (NewJourneyStation.Text.Trim() == string.Empty)
            {
                RegisterStartupScriptIfNeeded("StationEmpty", string.Format(pbHelpers.JavaScriptAlertString, "Der Routenpunkt darf nicht leer sein!"));
                return;
            }
            Subscription subscription = JourneySubscription;

            subscription.AddStation(new JourneyStation(NewJourneyStation.Text.Trim(), "", JourneySubscription.JourneyStations.Count + 1));
            NewJourneyStation.Text = string.Empty;
        }