Add this JS to my website's search box

I want to add the Google Suggest JS on my website's search. Google shows suggestions during typing. [login to view URL] My goal is to add this JS on my websites search box which is PHP based so that it shows suggestions when users are typing. Once the suggestion is selected the search will be submitted to my website but not Google. The code is released here and it is detailed commented : [login to view URL] I am attaching it as well.