Arranging Buttons

http://chevelleonline.net/wb/

I would like to rearrange the buttons at the top of my page so that instead of being in a vertical row they are in a horizontal row under the header flash swf (if you're using Mozilla you will be able to see the swf)

I changed my old code and put it in list form for each individual button since I figured that's how I would be able to make the buttons move into a horizontal position but it obviously didn't work...:

Code:

if(SHOW_MENU) {
?>
<div class="menu">
<?php show_menu(1,0,1,true,'<li><a href="http://www.chevelleonline.net/wb/" target="_top"><img src="http://www.chevelleonline.net/wb/templates/global/images/Buttons/01%20home.gif"></a></li>',''); ?>
<?php show_menu(1,0,1,true,'<li><a href="http://www.chevelleonline.net/wb/pages/home/band.php" target="_top"><img src="http://www.chevelleonline.net/wb/templates/global/images/Buttons/02%20band.gif"></a></li>',''); ?>
<?php show_menu(1,0,1,true,'<li><a href="http://www.chevelleonline.net/wb/pages/home/media.php" target="_top"><img src="http://www.chevelleonline.net/wb/templates/global/images/Buttons/03%20media.gif"></a></li>',''); ?>
<?php show_menu(1,0,1,true,'<li><a href="http://www.chevelleonline.net/Gallery/" target="_top"><img src="http://www.chevelleonline.net/wb/templates/global/images/Buttons/04%20gallery.gif"></a></li>',''); ?>
<?php show_menu(1,0,1,true,'<li><a href="http://www.chevelleonline.net/XMB" target="_top"><img src="http://www.chevelleonline.net/wb/templates/global/images/Buttons/05%20forum.gif"></a></li>',''); ?>
<?php show_menu(1,0,1,true,'<li><a href="http://www.chevelleonline.net/wb/pages/home/site.php" target="_top"><img src="http://www.chevelleonline.net/wb/templates/global/images/Buttons/06%20site.gif"></a></li>',''); ?>
<?php show_menu(1,0,1,true,'<li><a href="http://www.chevelleonline.net/wb/pages/home/links.php" target="_top"><img src="http://www.chevelleonline.net/wb/templates/global/images/Buttons/07%20links.gif"></a></li>',''); ?>
<?php

I'd really appreciate a way that I can make them horizontal (whether it be something i need to change in my index.php or my styles.css. thanks!