Add an extra level of security to your application with client side encryption. Even over an SSL connection, there are attacks which could expose your users' sensitive information. Using JSEncrypt, learn how to encrypt on the client side and decrypt on the server side.

Using the Google Maps Javascript API, learn how to plot markers onto a map. Load markers and info windows through AJAX calls to your Rails JSON API.

Using the Geocoder gem and Google APIs, learn how to add some geolocation functionality to your application.

Extending the previous episode, we look into making a realtime poll application where users can get live feedback on voting.

Using unobtrusive javascript, we can hide certain fields on forms based on the selected values of other fields.