AutoComplete for SharePoint

spAutoComplete.js

var $theField = $('input[title=RelatedAnnouncements]');
var listName = 'Announcements';
var listSvc = _spPageContextInfo.webServerRelativeUrl + '/_vti_bin/listdata.svc/' + listName;
$theField.autocomplete({
    source: function(request, response) {
        var typed = request.term;
        var listSvcFilter = listSvc + '?$filter=startswith(Title,\'' + typed + '\')';
        $.getJSON(listSvcFilter, function(data) {
            var items = [];
            $.each(data.d.results, function(key, val) {
                var item = {
                    label: val.Title,
                    value: val.Title,
                    desc: val.Body
                };
                items.push(item);
            });
            response(items);
        });
    },
    select: function(event, ui) {
        /* logging and updating the description field */
        console.log(ui);
        $('textarea[title=Description]').val(ui.item.desc);
    },
    minLength: 2,
    delay: 1000
});