Jquery Autocomplete

Jquery Doc:
http://jqueryui.com/demos/autocomplete/
http://docs.jquery.com/UI/Autocomplete

To perform some action when the item is selected using select event.
http://stackoverflow.com/questions/7733315/jquery-autocomplete-event-select

Normally, autocomplete searches the char or text entered in the entire string. If you want to change this behaviour and match with only the beginning of the string, refer below
http://jsbin.com/avoyu5/edit#javascript,html
http://www.jensbits.com/2011/04/28/jquery-ui-autocomplete-search-from-beginning-of-string/
http://stackoverflow.com/questions/2382497/jquery-autocomplete-plug-in-search-configuration
if you have any issues in using tag, use tag.label or tag.value
http://forum.jquery.com/topic/select-only-items-that-start-with-jquery-ui-autocomplete

Custom Formatting
http://stackoverflow.com/questions/2435964/jqueryui-how-can-i-custom-format-the-autocomplete-plug-in-results

Clear form field after select
http://stackoverflow.com/questions/2561903/clear-form-field-after-select-for-jquery-ui-autocomplete