모바일버전에서 상세정보 펼쳐보기 버튼이 나타나지 않습니다.

<script>
    function layer_toggle(obj) {
        if (obj.style.display == 'none') obj.style.display = 'block';
        else if (obj.style.display == 'block') obj.style.display = 'none';
    }
</script>
<div id="A" style="display: block;">
    <a onclick="layer_toggle(document.getElementById('A')); layer_toggle(document.getElementById('B')); return false;" href="#">접힌 상태</a>
</div>
<div id="B" style="display: none;">
    <a onclick="layer_toggle(document.getElementById('A')); layer_toggle(document.getElementById('B')); return false;" href="#">펼친 상태</a>
    <span style="line-height:50%"><br></span>
    <img src="https://appealart.co.kr/img/1.jpg">
</div>