Javascript / CoffeeScript to add ContentTools tools

General information for the business: HTML inline page editor
Description of requirements/functionality: I'm using ContentTools.js library for inline HTML editing.

I need to add the following functionality to the toolbox, so that a user can select text on the page and apply the changes:

1) Change font
2) Change font size
3) Change font colour

Here's a CoffeeScript tutorial for adding new tools to the toolbox, but it can also be accomplished in Javascript: http://getcontenttools.com/tutorials/adding-new-tools

I will accept proposals for Javascript or CoffeeScript, but CoffeeScript would be an advantage.
Specific technologies required: Javascript, CoffeeScript
Extra notes: