fixed comparative expressions as per Crockfords JS the goodparts, because == can create false positive situations. Instead it is easier to use === at all times!
Added commenting to explain code as well as some notes for future changes to make the code more efficient. Also considered moving the initialiser function down to the bottom as Javascript is a dynamic prototypal scripting language and should be used as such, however the word variable needs to be defined before it is used in processLettre function. Also discovered that files need the jquery library for offline dependency.
Changed the jquery file references to local files so that the app can be worked on offline. These should be changed back for live dev. I also changed all single ' to double " in the html markup as I am a traditionalist and like to differentiate, this can help parsers which might be processing the code and can stop errors in javascript.
Added local files for jquery, jquery mobile with accompanying css and image files