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<body id="body_XXX">
<ul id="nav">
<li id="nav_hom"><a href="#">Home</a></li>
<li id="nav_map"><a href="#">Maps</a></li>
<li id="nav_jou"><a href="#">Journal</a></li>
<li id="nav_his"><a href="#">History</a></li>
<li id="nav_ref"><a href="#">References</a></li>
<li id="nav_con"><a href="#">Contact</a></li>
</ul>
</body>

<style>
#body_hom #nav_home a, #body_map #nav_map a,
#body_jou #nav_jou a, #body_his #nav_his a,
#body_ref #nav_ref a, #body_con #nav_con a {
--- --- ---
}
</style>