jQuery & jQueryUI Base

HTML

<link rel="stylesheet" href="http://ajax.aspnetcdn.com/ajax/jquery.ui/1.8.13/themes/black-tie/jquery-ui.css">
<script src="http://ajax.aspnetcdn.com/ajax/jquery.ui/1.8.13/jquery-ui.js"></script>
<input />

JavaScript

var $input = $("input").autocomplete({
    source: ['Hello', 'Goodbye', 'Foo', 'Bar']
});
$input.data("autocomplete").menu.options.selected = function(event, ui) { 
    var item = ui.item.data( "item.autocomplete" );
    $input.focus();
};