Upgraded jQuery from 1.4.2 to latest 1.11.2

* Changes : Upgraded jQuery 1.4.2 to 1.11.2
* Removed depreciated api such as `browser.msie` and `live` which is replaced by `on`
* Fixed some upgrade issues

This line is still needed, right? The [documentation for `e.preventDefault()`][1] says that it prevents the default action of clicking the link, namely navigating to the new page.

[1]: http://api.jquery.com/event.preventdefault/