Calling a CI library from a javascipt?

[eluser]Ray Julich[/eluser]
I am adding an AJAX autocomplete to my CI site, which uses a javascript include. Inside the javascript, it includes a .php file.

Code:

this.ajaxTarget = 'Autocomplete.php';

I copied this javascript from a site on the web and adapted is to my needs. The problem I've run into is that to get the data I need in the Autocomplete.php file, I need access to CI session variables and to a CI library. Is there a way for a javascript to get access to those CI files?