$res = mysql_query("select * from `lib` where `type` = 'bk' and `moder`='1' and `count`>'0' ORDER BY `count`");
$ccc = mysql_num_rows($res);
for ($i = 0; $i < 4; $i++)
{
$rand = rand(1, $ccc);
$arr = mysql_fetch_array(mysql_query("select * from `lib` where `id` = '" . $rand . "'"));
echo '<b><a href="library/index.php?id=' . $arr['id'] . '">' . $arr['name'] . '</a></b><br/>' . $arr['announce'] .
'<br/>';
}