JQueryUI - ComboBox Testing

Fiddle to evaluate different Jquery UI combobox

HTML

<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.1/themes/base/jquery-ui.css">
<script src="http://code.jquery.com/ui/1.10.1/jquery-ui.js"></script>
<input type="text" class="patientlocation" value="Exam 1" />
<br /><br />
<input type="text" class="patientlocation" value="" />

CSS

body {
    padding: 10px
}
.ui-widget {
    font-size:12px;
}
.ui-combobox {
    position: relative;
    display: inline-block;
    margin-right:25px;
}
.ui-combobox-toggle {
    position: absolute;
    top: 0;
    bottom: 0;
    margin-left: -1px;
    padding: 0;
    /* support: IE7 */
    *height: 1.7em;
    *top: 0.1em;
}
.ui-combobox-input {
    margin: 0;
    padding: 0.3em;
}
.ui-state-default {
    font-weight:normal;
}

JavaScript

var patient_location_data = ["Waiting", "Exam 1", "Exam 2", "Exam 3", "Exam 4", "Exam 5", "Exam 6", "Exam 7", "Exam 8", "Exam 9", "Exam 10", "Exam 11", "Exam 12", "Exam 13", "Exam 14", "Exam 15", "Ready to room", "Departed"];

(function ($) {
    $.widget("ui.combobox", {
        _create: function () {


            var wrapper = this.wrapper = $("<span />").addClass("ui-combobox"),
                self = this;

            this.element.wrap(wrapper);

            this.element.addClass("ui-state-default ui-combobox-input ui-widget ui-widget-content ui-corner-left")
                .autocomplete($.extend({
                minLength: 0
            }, this.options));

            $("<a />")
                .insertAfter(this.element)
                .button({
                icons: {
                    primary: "ui-icon-triangle-1-s"
                },
                text: false
            })
                .removeClass("ui-corner-all")
                .addClass("ui-corner-right ui-combobox-toggle")
                .click(function () {
                if (self.element.autocomplete("widget").is(":visible")) {
                    self.element.autocomplete("close");
                    return;
                }

                $(this).blur();
                self.element.autocomplete("search", "");
                self.element.focus();
            });
        },

        destroy: function () {
            // kill the auto-complete
            this.element.autocomplete('destroy');
            // kill the button
            this.element.next().remove();
            // kill the wrapper
            this.element.unwrap();
            $.Widget.prototype.destroy.call(this);
        }
    });
})(jQuery);

$(document).ready(function () {
    $(".patientlocation").combobox({
        source: patient_location_data,
        change: function (event, ui) {
            var custom_text = (event.currentTarget == null) ? '' : event.currentTarget.value;
           ...