Multi Categorie WP

//$list = query_posts('category_name='.$cat_name.'&orderby='.$orderby.'&order='.$order);
//$list = query_posts('category__and=14,19&orderby='.$orderby.'&order='.$order);
//$list = query_posts( array( 'category__and' => array(14,19), 'orderby' => 'title', 'order' => 'DESC' ) );
//$list = new WP_Query( 'category_name=Bad' );
//$list = new WP_Query( array( 'category__and' => array( 14, 19 ) ) );
//$list = get_posts(array('category__and' => array(14,19))) ;

printf("<br>%d Beiträge für Download sind da:",count($list));