How to Download & Install

Download :

You can use this link to download knockoutjs
http://knockoutjs.com/downloads/knockout-3.1.0.js

Steps ->  Right click of mouse-> save as..
              Now you can use that .js file in your projects

or You can use CDNs
older version :
http://ajax.aspnetcdn.com/ajax/knockout/knockout-2.2.1.js
http://ajax.aspnetcdn.com/ajax/knockout/knockout-2.1.0.js
new version :
http://cdnjs.cloudflare.com/ajax/libs/knockout/3.1.0/knockout-min.js
http://ajax.aspnetcdn.com/ajax/knockout/knockout-3.1.0.js


Installation:

<script type='text/javascript' src='knockout-3.1.0.js'></script>

you just need to do this :
In your script tag src paste the link
<script src="http://ajax.aspnetcdn.com/ajax/knockout/knockout-3.1.0.js" type="text/javascript"></script>

For More :
visit         http://knockoutjs.com/downloads/index.html