$id):
$src = wp_get_attachment_image_src($id, $size);
if( empty($src) )
continue;
$image = get_post($id);
$title = isset($image->post_title) ? $image->post_title : null;
$caption = isset($image->post_excerpt) ? $image->post_excerpt : null;
$active = ($i == 0) ? 'active' : '';
?>