index.html

<frameset rows="20%,80%">
	<frame src="menu.html"></frame>
	<frame src="home.html" name="main"></frame>
</frameset>

menu.html

<ul>
	<li><a href="home.html" target="main">Home</a></li>
	<li><a href="about.html" target="main">About Us</a></li>
	<li><a href="course.html" target="main">Courses</a></li>
</ul>