folks & gurus, am trying to find a viable-tryable pattern that would allow me to inform my Servlet of a single change of value on my JSP. I need to send the new value and the field Name/ID that changed.
Well, as I'm sure you know, once a page is sent to the browser the job of the servlet that generated the page is done and there can be no further communciation. Any subsequent interaction needs to happen in the guise of a new HTTP request back to the server.
You can generate such a request by submitting a page, but you can also use the XMLHttpRequest object (aka AJAX technology) to send a 'behind the scenes" request back to a servlet informing the server of changes.