<!DOCTYPE html>
<html lang="ko">
<head>
<meta charset="utf-8">
<style>
.box {
height: 300px;
width: 30%;
margin: 10px 0 0 0
}
.comment {
height: 300px;
width: 30%;
background: gray;
}
</style>
<script src="./js/jquery.js"></script>
</head>
<body>
<div class='box'>
<div class='comment'>1번</div>
</div>
<div class='box'>
<div class='comment'>2번</div>
</div>
<div class='box'>
<div class='comment'>3번</div>
</div>
<script>
var target = $('.comment');
target.click(function() {
$(this).stop().slideUp('slow');
target.not($(this)).slideDown('slow'); // 클릭된 요소를 제외한 형제요소
});
</script>
</body>
</html>