●index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="./index.css">
</head>
<body>
<div class="container">
<div class="header">
<h1>header 영역</h1>
<div class="rtnav">
<ul>
<li><a href="#">메뉴1</a></li>
<li><a href="#">메뉴2</a></li>
<li><a href="#">메뉴3</a></li>
<li><a href="#">메뉴4</a></li>
</ul>
</div>
<div class="lbnav" id="aa">
<h2>왼쪽밑에</h2>
</div>
</div>
<div class="content">
<h1>content 영역</h1>
</div>
<div class="footer">
<h1>ㅁㄴㄹㅇㅁㅎㄹㅁㅎㄹㄹㅎㅁㅎㅁㅇㄴㄹㅇㅁㄴㄹㅇㅁㅎㅁㅇㄴㄹㅇㄴㅇㄹㅁㄹㅎㄴㅇ</h1>
</div>
</div>
<script>
document.getElementById('aa').style.right = '0';
</script>
</body>
</html>
<a 태그로 누를수 있게 만들어준다.
css 를 쓸려면
<link rel="stylesheet" hrep ="/index.css"> 로 불러온다