$numrows = $db->sql_numrows($db->sql_query("SELECT * FROM ".$prefix."_banner WHERE type='0' AND active='1'"));

    $sql = "SELECT * FROM ".$prefix."_banner WHERE type='0' AND active='1'";
		if( !$query = $db->sql_query($sql) )
		{
			die('Could not obtain banner information', '', __LINE__, __FILE__, $sql);
		}    
   $numrows = $db->sql_numrows($query);