Someone

<?php
function get_page_root( $post ) {
	$ancestors = $post->ancestors;
	if ( is_array( $ancestors ) && count( $ancestors ) > 0 )
		return end( $ancestors );
	else
		return $post->ID;
	return 0;
}
?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" dir="ltr" lang="en-US">
<head>
<meta http-equiv="Content-Type" content="text/html charset=UTF-8" />
<title>Weird Theme</title>
<style type="text/css">
#page{
	width:900px;
	margin:0 auto;
	}
#menu {
	width:150px;
	float:left;
	}
#submenu {
	width:150px;
	float:left;
	}
#content{
	width:500px;
	float:left;
	}
.clear{ clear:both; }
</style>
</head>
<body>
	<div id="page">
		<div id="menu">
		<?php
		wp_list_pages( 'title_li=&depth=1' );
		?>
		</div>
		<?php	
			if( is_page() ) {
				print "\n\t\t" . '<div id="submenu">';
				wp_list_pages( 'title_li=&child_of=' . get_page_root( $post ) );
				print "\n\t\t" . '</div>';
			}
		?>
		<div id="content">
		<?php
		if ( have_posts() ) {
			while ( have_posts() ) {
				the_post();
				the_title( '<h1>', '</h1>' );
				the_content();
			}
			comments_template();
		}
		else {
			print '<h1>Not Found</h1><p>Sorry, but the resuorce you are looking for could not be found.</p>';
		}
		?>
		</div>
		<div class="clear"></div>
	</div>
</body>
</html>