What is a possible event I can use to bind whenever the select box is closed by the x button?

```
        <select name="select-choice-6" id="select-choice-6" class="select" multiple="multiple" data-native-menu="false">
            <option>Search by:</option>
            <option value="id">Student ID</option>
            <option value="permit">Permit</option>
            <option value="license">License Plate</option>
            <option value="first">First Name</option>
            <option value="last">Last Name</option>
            <option value="lot">Lot Code</option>
        </select>
        <script type="text/javascript">
            $(document).on( "popupafterclose", ".ui-popup-container", function() {
                alert("hi");
            });
            $("#select-choice-6").trigger("popupafterclose");

```