当连接指向同一网站中的其他页面时，就没必要在URL中指定域名这时我们可以采用简短的相对URL.
<!DOCTYPE html>
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<html>
<head>
<title>TODO supply a title</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
<div>TODO write content</div>
<p>
<ul>
<li><a href="index.html">home</a></li>
<li><a href="about-us.html">About</a></li>
<li><a href="movies.html">Movies</a></li>
<li><a href="contact.html">Contact</a></li>
</ul>
</p>
</body>
</html>