<?php  

global $wpdb; $attachment_id = $wpdb->get_var("SELECT ID FROM $wpdb->posts WHERE post_parent = '$post->ID' 
AND post_status = 'inherit' AND post_type='attachment' ORDER BY post_date DESC LIMIT 1");
				$tip = wp_get_attachment_url($post->ID);

if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>

<div class="screenimg">
					
<a href="<?php the_permalink() ?>" rel="<?php echo wp_get_attachment_url($attachment_id); ?>" class="tip"><?php the_post_thumbnail(array(330, 190)); ?></a>

</div>

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