<nav> ... </nav>
HTML5 only. Represents a section of the document intended for navigation.
Not all lists of links are appropriate for
nav, only those that represent major
navigation blocks on a page or within a section. The links within a
nav element can be to other
documents or to other areas within the current document.
<li><a href="">About us</a></li>
nav is a semantic section element. Its rendering is dependent on style rules.