How to add ID (or class) to list of page children?

Hi,

I am using this code:

if($post->post_parent)
		$children = wp_list_pages("title_li=&child_of=".$post->post_parent."&echo=0");
		else
		$children = wp_list_pages("title_li=&child_of=".$post->ID."&echo=0");
		if ($children) { ?>
		<ul>
		<?php echo $children; ?>
		</ul>

That gives me code like this:

<em><ul>
<li class="page_item page-item-17"><a href="permalink" title="case 1, print ad">case 1, print ad</a></li>
<li class="page_item page-item-15 current_page_item"><a href="permalink" title="case 1, tv ad">case 1, tv ad</a></li>
</ul></em>

I want to style the list depending on the content. Is it possible to add some code into the list-tag? Like the “ID=’PRINT'” in this code:

<li class="page_item page-item-17" ID="PRINT"><a href="permalink" title="case 1, print ad">case 1, print ad</a></li>

Thanks