Disabling unwanted automatic item focus upon autocomplete

Disabling unwanted automatic item focus upon autocomplete

For Autocomplete:
How do I stop jQueryUI from automatically focusing on a ui item when the autocomplete menu opens and the mouse has been positioned such that it is over the ui item when the menu opens.  This can be seen in the jQueryUI demo.

This is not desired since pressing enter will cause the focused ui item to be selected.

Why?
Because this causes problems if the input field is used as a search field where selection also fires a form submission.

Pressing enter with the unwanted ui item focused causes first, selection of the unwanted ui item, then submission of the form.  In a search field, the value originally in the input field is the value that should be submitted.

To clarify with an analogy, if I wanted to search for "big" in Google, but did not want to search for their 5 autocompleted searches (for example, "big notorious", "big lots", etc.), AND if my mouse was over one of those options when I pressed enter, Google would search for "big", not whatever search terms my mouse was over.

If the first request cannot be accomplished, is there a way I can cause form submission to occur instead of selection when the enter key is pressed?