i coded this for use on the Keon (FFOS geek phone) and demo-ed it at the local JS meetup http://replycam.com/m/ (also on github https://github.com/franzenzenhofer/masel) will extend it someday do also encode/decode SMS messages ... but as i will never probably come around to it, just steal the idea, fork the project (it's zlib license, as soon as i come around to write a readme)