Scriptaculous Ajax.autocompleter stop preselect of first option item 1

I have this search feature on the search input of my sites, but was annoyed when I’d hit the enter button the keyboard to submit the search after the autocomplete items were visible. Instead of submitting the form as I desired, the first autocomplete option was entered into the input and then the form was submitted.

To disable the pre selection of the first result item in the autocomplete, do the following:

In controls.js of the Scriptaculous library, on line 286: change “this.index = 0;” to “this.index = -1;”