title: ASP.NET Forms autosave
body: <p>We have an internal asp.net forms app where one page is essentially a WYSIWYG editor that users enter 3-5 paragraph reports into.  What are the best options for an autosave feature with the minimum amount of user-interrupt?  I don't want to force a postback every five minutes or so unless I have to, but rather maybe some type of client-side check every time the text changes and compare that to the last time the information has been submitted, and go from there?</p>