Using CryptoJS to encrypt strings, e.g., passwords is as easy as adding the following lines of code to your app.

crypto.js

//add to your index page
<script src="http://crypto-js.googlecode.com/svn/tags/3.1.2/build/rollups/md5.js"></script>

// add to your JS file, for instance, on a click 'submit' button
  password = $('#password').val();
  password = CryptoJS.MD5(password);