function updateOrder()
{
    var options = {
                    method : 'post',
                    parameters : Sortable.serialize('movies_list')
                  };
	
	alert(Sortable.serialize('movies_list'));
 
    new Ajax.Updater('text', 'processor.php?playlist_id=<?php echo $id;?>', options);

}



Sortable.create('movies_list', { onUpdate : updateOrder });


/////php code

$movies = getMovies($id);

echo '<ul id="movies_list">';

$i = 1;
foreach($movies as $videoid=>$movie) {
	echo '<li id="video_'.$videoid.'">'.$movie.'</li>';
	$i = $i + 1;
}

echo '</ul>';