json = new JSONObject();
json.put("async", Boolean.TRUE);
json.put("json", isJson());
DirectServiceParameter dsp = new DirectServiceParameter(form, null, this);
json.put("url", getDirectService().getLink(true, dsp).getURL());
}
// only if not async - otherwise we have to stop the client side event to prevent normal form submission
// within the submitbindings client side generated function