'page', 'post__in' => $slider_Arr, 'orderby' => 'post__in' ) );
while( $slidequery->have_posts() ) : $slidequery->the_post();
$image = wp_get_attachment_url( get_post_thumbnail_id($post->ID));
$thumbnail_id = get_post_thumbnail_id( $post->ID );
$alt = get_post_meta($thumbnail_id, '_wp_attachment_image_alt', true);
?>
rewind_posts();
while( $slidequery->have_posts() ) : $slidequery->the_post(); ?>
have_posts() ) : $queryvar->the_post(); ?>