pt>
            void function () {
                var img = document.getElementsByTagName('main')[0].getElementsByTagName('img')[0];
                img.onerror = function() {
                    document.getElementById('js-title').setAttribute('style', 'display: block');
                };
            }();
        </script>
        <section class="op-panel">
            <div>
                <label class="op-name">auto-highlight：</label>
                <label><input name="auto" type="radio" value="on" 