Changes colour of password text box according to the password rules. Uses the Twitter Bootstrap colours for errors.
Textboxes take the twitter bootstrap inheritted styles but you can leave out the bootstrap stuff to use your own formatting and keep the text box changing.
Development is using coffee-script but minified javascript is included
-Doesnt work in versions of IE < 10 for some effed up reason - feel free to figure out
http://www.j4m355.com/Bootstrap-Password-Strength