// Alternativas: http://dean.edwards.name/weblog/2005/02/order-of-events/
ItsNatStfulDocumentImpl itsNatDoc = getItsNatStfulDocument();
Document doc = itsNatDoc.getDocument();
OnLoadBackForwardListenerImpl listener = new OnLoadBackForwardListenerImpl();
ParamTransport[] extraParam = OnLoadBackForwardListenerImpl.createExtraParams();
String eventType;
EventTarget target;
if (browser.isClientWindowEventTarget())
{