Sorting the posts

there’ some example code in the link supplied that will restrict post navigation to the prevailing post category.

Anyone know how to SORT the post results by post name or title?
code below _________

add_filter( ‘get_next_post_join’, ‘navigate_in_same_taxonomy_join’, 20);
add_filter( ‘get_previous_post_join’, ‘navigate_in_same_taxonomy_join’, 20 );
function navigate_in_same_taxonomy_join() {
global $wpdb;
return ” INNER JOIN $wpdb->term_relationships AS tr ON p.ID = tr.object_id INNER JOIN $wpdb->term_taxonomy tt ON tr.term_taxonomy_id = tt.term_taxonomy_id”;
}

add_filter( ‘get_next_post_where’ , ‘navigate_in_same_taxonomy_where’ );
add_filter( ‘get_previous_post_where’ , ‘navigate_in_same_taxonomy_where’ );
function navigate_in_same_taxonomy_where( $original ) {
global $wpdb, $post;
$where = ”;
$taxonomy = ‘category’;
$op = (‘get_previous_post_where’ == current_filter()) ? ‘<‘ : ‘>’;
$where = $wpdb->prepare( “AND tt.taxonomy = %s”, $taxonomy );
if ( ! is_object_in_taxonomy( $post->post_type, $taxonomy ) )
return $original ;

$term_array = wp_get_object_terms( $post->ID, $taxonomy, array( ‘fields’ => ‘ids’ ) );

$term_array = array_map( ‘intval’, $term_array );

if ( ! $term_array || is_wp_error( $term_array ) )
return $original ;

$where = ” AND tt.term_id IN (” . implode( ‘,’, $term_array ) . “)”;
return $wpdb->prepare( “WHERE p.post_date $op %s AND p.post_type = %s AND p.post_status = ‘publish’ $where”, $post->post_date, $post->post_type );
}

The page I need help with: [log in to see the link]