natanver

I suppose you could do something like this to get the highest slider ID:

if ( function_exists( "easingslider" ) ) { 

$out = array();

$args=array(
 'post_type' => 'easingslider',
 'post_status' => 'publish',
 'orderby' => 'ID',
 'order' => 'DESC',
 'posts_per_page' => -1,
 'caller_get_posts'=> 1
);

$my_query = null;
$my_query = new WP_Query($args);
if( $my_query->have_posts() ) {
 while ($my_query->have_posts()) : $my_query->the_post();
	$out[] = get_the_ID();
 endwhile;
}
wp_reset_query();

easingslider( max($out) );

}

but – I’m not a wordpress guru, mayby there is a better way…