[N!ck]

something like:

PHP Code:

<?
require("/path/to/forums/global.php");
$last24 = time() - 86400;
$threads = $DB_site->fetch_array($DB_site->query("SELECT COUNT(*) as total FROM thread WHERE lastpost > $last24 AND (forumid = 'FORUMID1' OR forumid = 'FORUMID2')"));
echo $threads[total];
?>

that SHOULD work, but i'm no expert and i didn't test this code so...