.autocomplete is not a function Error

Found the problem, I was including another jquery file for my google translator, they were conflicting with each other and resulting in not loading the autocomplete function.

Sounds like autocomplete is being called before the library that defines it is actually loaded - if that makes sense?

If your script is inline, rather than referenced, move it to the bottom of the page. Or (my preferred option) place the script in an external .js file and then reference it:

<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
<script src="yourNewJSFile"></script>

Edit: if you externalise your script, ensure it is referenced AFTER any JQuery libraries it relies on :)