Using the include directive
For example create a "menu.html" in your site
<ul>
<li><a href="/Home">Home</a></li>
<li><a href="/Products">About us</a></li>
<li><a href="/Products">Products</a></li>
<li><a href="/Services">Services</a></li>
<li><a href="/Contact">Contact us</a></li>
</ul>
Now you can use the include directive to include it in another page
<!DOCTYPE html>
<html>
<head>
<title>Test page</title>
<meta charset="UTF-8"/>
</head>
<body>
<div>
<!--#include file="Menu.html" -->
<h1>About us</h1>
<p>This is a test page that includes a menu from another file using the include directive.</p>
</div>
</body>
</html>