For assignment 4, Subject 2, I made a manifest.appcache file (AboutDunbar12.appcache) for the about page using the manifestR tool to generate the code. The about page has been modified to include the AboutDunbar12.appcache file in the opening html tag and renamed AboutDunbar12wManifest.html. AboutDunbar12.appcache includes references for the css and image files in the CACHE section.

Surprisingly, the .appcache code generated by the manifestR tool completely left out a FALLBACK section. Since, according to our class notes, a FALLBACK section is required if a CACHE or a NETWORK is specified, I manually added a FALLBACK section and created an offline.html in case of something unexpected.

Validation of .appcache: http://a4.lagrangian.info/AboutDunbar12.appcache validated with http://manifest-validator.com/.

Testing: Offline capabilities were tested with recent versions of Chrome, Firefox, Opera, Safari and Maxthon. Most of the page including the text and the image displayed as expected offline. The youtube video, of course, could not be viewed with slightly different browser-specific behaviors encountered on testing.