responsive navbar using only css code example

Example: create responsive navbar without javascript

<input type="checkbox" id="menuShowHide">
<label for="menuShowHide"></label>
<ul id="mainMenu">
	<li><a href="#">Home</a></li>
	<li><a href="#">Forums</a></li>
	<li><a href="#">Tutorials</a></li>
	<li><a href="#">Reviews</a></li>
	<li><a href="#">Links</a></li>
	<li><a href="#">Contact Us</a></li>
</ul>