    ls_set('aribCaptionTransmitMode', 'timed_id3');
            }

            if (mediaSourceURL.className === '') {
                ls_set('inputMode', 'MediaDataSource');
            } else {
                ls_set('inputMode', 'StreamURL');
            }
            var i;
            for (i = 0; i < checkBoxFields.length; i++) {
                var field = checkBoxFields[i];
                /** @type {HTMLInputElement} */
                var checkbox = document.getElementById(field);
                ls