          <input type="hidden" name="page" value="customize" />
                    </div>
                </div>
            </div>
        </div>
        </form>
        <script type="text/javascript">
            var form = document.getElementById('customForm'); // Replaced const with var
            var btn = document.getElementById('customClearButton');
            btn.addEventListener("click", function () {
                var boxes = form.getElementsByTagName('input'); // Replaced let with var
      