>>>>Take a look at backbone.js http://backbonejs.org/
>>>>
>>>Are you sure it's the correct web address?
>>
>>Yep, I did a copy&paste from the address line.
>
>Yes, it works now. Can you tell me the main difference between knockout.js and this one and why did you chose it?
>
>Knockout has very nice tutorial available.

Mainly because it is easier to move a backbone app to non-HTML platforms than it is with knockout.
There is a free book at http://addyosmani.github.com/backbone-fundamentals/