<ul id="nav">
<?php if (is_home()) { ?><li id="home_on"><?php } else { ?><li id="home"><?php } ?><a href="<?php bloginfo('home'); ?>">Home</a></li>
<?php if (is_page('about')) { ?><li id="about_on"><?php } else { ?><li id="about"><?php } ?><a href="<?php bloginfo('url'); ?>/about/">About</a></li>
<?php if (is_page('resume')) { ?><li id="popular_on"><?php } else { ?><li id="popular"><?php } ?><a href="<?php bloginfo('url'); ?>/resume/">Popular</a></li>
<?php if (is_page('contact')) { ?><li id="archives_on"><?php } else { ?><li id="archives"><?php } ?><a href="<?php bloginfo('url'); ?>/contact/">Archives</a></li>
</ul> | 