Thanks for reply, I tried that but its had a really wierd effect on the menus, I have left it up for you to see.
This is the original, header code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head profile="http://gmpg.org/xfn/11">
<meta http-equiv="Content-Type" content="<?php bloginfo('html_type'); ?>; charset=<?php bloginfo('charset'); ?>" />
<title><?php bloginfo('name'); ?><?php wp_title(); ?></title>
<meta name="generator" content="WordPress <?php bloginfo('version'); ?>" /> <!-- leave this for stats -->
<style type="text/css" media="screen">
@import url( <?php bloginfo('stylesheet_url'); ?> );
</style>
<link rel="alternate" type="application/rss+xml" title="RSS 2.0" href="<?php bloginfo('rss2_url'); ?>" />
<link rel="alternate" type="text/xml" title="RSS .92" href="<?php bloginfo('rss_url'); ?>" />
<link rel="alternate" type="application/atom+xml" title="Atom 0.3" href="<?php bloginfo('atom_url'); ?>" />
<link rel="pingback" href="<?php bloginfo('pingback_url'); ?>" />
<?php wp_get_archives('type=monthly&format=link'); ?>
<?php wp_head(); ?>
</head>
<body>
<div id="rap">
<div id="top">
<div id="topleft">
<ul id="menu">
<li<?php if(!is_page() ) { ?> class="current_page_item"<?php } ?>>">Home
<?php wp_list_pages('sort_column=post_date&title_li='); ?>
</div>
<div id="topright">
<form class="searchform" method="get" action="<?php bloginfo('url'); ?>/">
<fieldset>
<label><?php _e('Search our blog'); ?></label>
<input type="text" value="<?php the_search_query(); ?>" name="s" class="searchinput" />
<input type="submit" value="" class="searchbutton" />
</fieldset>
</form>
</div>
</div>
<div id="header">
<div class="header-title">/"><?php bloginfo('name'); ?></div>
<div class="header-description"><?php bloginfo('description'); ?></div>
<div class="ads"><h2></h2>
<?php advertisement(); ?>
</div>
</div>
<div id="category">
<div id="categoryx">
<ul id="dcategory">
<?php global $video; ?>
<?php wp_list_categories('hide_empty=0&title_li=&exclude='.$video); ?>
</div>
<div id="categoryy"></div>
<div class="clear"></div>
</div>
<?php get_sidebar(); ?>
<div id="content">
<!-- end header -->