Exclude Categories in Search Results in wordpress

Below  is the code  to does not show  the posts from category 9,14 during  search.

<?php
$page  = (get_query_var('paged')) ? get_query_var('paged') : 1;
$s = get_query_var('s');
query_posts("s=$s&cat=-9,-14&paged=$page");
?>

<?php if (have_posts()) : while (have_posts()) : the_post(); ?>
<?php   the_title(); ?><br /><br />
<?php endwhile;endif;?>
<?php next_posts_link('&laquo; Old Updates') ?>
<?php   previous_posts_link('Latest Updates &raquo;')