[eluser]PhilTem[/eluser]
The library is called 'javascript' which is more a driver than a library (at least it's intended to be more a driver than a library, but the source-code does not do this). Therefore use
Code:
$this->load->library('javascript'); // autoloads jquery-library
// OR
$this->load->library('javascript', array('js_library_driver' => 'scripto', 'autoload' => FALSE)); // loads script-library (which doesn't exist yet)