B.  AJAX can submit to servers without user interaction
•Possible to save/change data without user knowing it is happening
–Can occur at any time, not necessarily on pressing "Submit"
•Often very quick in processing data
–Users may expect a short delay or page refresh when they submit data
•Possible solutions:
–1.  inform the user at the top of the form how and when their data will be save and  used
–2.  provide some indicator (visible or audible) that data was saved
–3.  Allow user to explore UI and add or edit/undo data before it is saved
•important "forgiveness" usability - may mean still using a "Save button"
•But the problem is more general than this ...