http://stackoverflow.com/questions/7704268/formatting-rules-for-numbers-in-knockoutjs
jQuery 1.9.1, HTML, CSS, JavaScript
To show a quirk in the select box databinding implementation of knockout. If you try to set the value of a select to a value that doesn't exist in the select, then the datacontext drops the associated property.
Knockout.js 2.2.1, HTML, CSS, JavaScript
No-Library (pure JS), HTML, CSS, JavaScript