JavaScript Event Notifier - Document Navigation question

Hello! I also have a question regarding the JavaScript Event Notifier. In this link: https://docs.esignlive.com/content/c_integrator_s_guide/event_notifier/event_notifier.htm ... I see that there there are two events in which I am interested, ESL:MESSAGE:STARTED:DOCUMENT_NAVIGATION and ESL:MESSAGE:SUCCESS:DOCUMENT_NAVIGATION. I understand that these are not when the user signs a document and proceeds to the next, but just when they navigate using the left/right arrows. I am able to successfully use the sample code to receive the events. However, is there a way to tell which direction the user navigated? i.e Can I tell whether the user navigated from document 2 to document 1, or from document 2 to document 3? Thanks! Garrett