Alternating Comments

by the way, this is the code for my comments.php page:

<?php // Do not delete these lines
	if ('comments.php' == basename($_SERVER['SCRIPT_FILENAME']))
		die ('Please do not load this page directly. Thanks!');

        if (!empty($post->post_password)) { // if there's a password
            if ($_COOKIE['wp-postpass_' . COOKIEHASH] != $post->post_password) {  // and it doesn't match the cookie
				?>

This post is password protected. Enter the password to view comments.

				<?php
				return;
            }
        }
		/* This variable is for alternating comment background */
		$oddcomment = 'comment_bottom';
?>

<!-- You can start editing here. -->

<?php if ($comments) : ?>

<ol>
	<?php $commentcounter = 0; ?>
	<?php foreach ($comments as $comment) : ?>
		<?php $commentcounter++; ?>

<div class="comment_top"></div><div class="comment_middle">
<div class="comment_num"><li id="comment-<?php comment_ID() ?>">

<?php echo $commentcounter; ?>.

</div>

<div class="comment_text">

<?php if ($comment->comment_approved == '0') : ?>
<em>Your comment is awaiting moderation.</em>
<?php endif; ?>

<?php comment_text() ?>
</li>

</div>
</div><div class="comment_bottom">Posted by <a href="#"><?php comment_author_link() ?></a> on <a href="#comment-<?php comment_ID() ?>" title="" class="datelink"><?php comment_date('M j, Y') ?> @ <?php comment_time() ?></a> <?php edit_comment_link('(Edit)','',''); ?></div>

	<?php /* Changes every other comment to a different class */
		if ('comment_bottom' == $oddcomment) $oddcomment = '';
		else $oddcomment = 'comment_bottom';
	?>

	<?php endforeach; /* end for each comment */ ?>

</ol>

 <?php else : // this is displayed if there are no comments so far ?>

  <?php if ('open' == $post->comment_status) : ?>
		<!-- If comments are open, but there are no comments. -->

	 <?php else : // comments are closed ?>
		<!-- If comments are closed. -->
		<p class="nocomments">Comments are closed.</p>

	<?php endif; ?>
<?php endif; ?>

<?php if ('open' == $post->comment_status) : ?>

<?php if ( get_option('comment_registration') && !$user_ID ) : ?>
<br />You must be <a href="<?php echo get_option('siteurl'); ?>/wp-login.php?redirect_to=<?php the_permalink(); ?>" class="datelink">logged in</a> to post a comment.
<?php else : ?>

<form action="<?php echo get_option('siteurl'); ?>/wp-comments-post.php" method="post" id="commentform">

<?php if ( $user_ID ) : ?>

<br />Logged in as <a class="datelink" href="<?php echo get_option('siteurl'); ?>/wp-admin/profile.php"><?php echo $user_identity; ?></a>. <a href="<?php echo get_option('siteurl'); ?>/wp-login.php?action=logout" title="Log out of this account" class="datelink">Logout &raquo;</a><br />

<?php else : ?>

<br /><strong>Name</strong>: <?php if ($req) echo "*"; ?><br />
<input type="text" name="author" id="author" value="<?php echo $comment_author; ?>" size="97%" tabindex="1" />

<br /><strong>E-Mail</strong>: <?php if ($req) echo "*"; ?> (not displayed)<br />
<input type="text" name="email" id="email" value="<?php echo $comment_author_email; ?>" size="97%" tabindex="2" />

<br /><strong>Website</strong>:<br />
<input value="http://elena.esaudrae.net/" type="text" name="url" id="url" value="<?php echo $comment_author_url; ?>" size="97%" tabindex="3" />

<?php endif; ?>

<br /><strong>Comment</strong>:<br />
<textarea name="comment" id="comment" cols="60%" rows="6" tabindex="4"></textarea>

<br /><input name="submit" type="submit" id="submit" tabindex="5" value="Submit Comment" />
<input type="hidden" name="comment_post_ID" value="<?php echo $id; ?>" />
 <input type="reset" name="reset" value="Reset Comment">

<?php do_action('comment_form', $post->ID); ?>

</form>

<?php endif; // If registration required and not logged in ?>

<?php endif; // if you delete this the sky will fall on your head ?>