header

Co znemena :

Warning: Cannot modify header information - headers already sent by (output started at C:\Program Files\Apache Group\Apache2\localhost\rs\index.php:9) in C:\Program Files\Apache Group\Apache2\localhost\rs\brcal\clanek.php on line 19

Co mam spatne?

function nenalezeno()
{
header("Location: 404.html");
};

<?php
// Funkce

function vypis_clanek($id)
{
$sql = "SELECT id, text FROM clanky WHERE id='".$id."';";
$dotaz = mysql_query($sql);
$pocet_radku = mysql_num_rows($dotaz);
if ($pocet_radku > 0):
$clanek = mysql_fetch_array($dotaz);
echo $clanek["text"];
else:
nenalezeno();
endif;
};

function nenalezeno()
{
header("Location: 404.html");
};

function zobraz_nejnovejsi()
{
$sql = "SELECT id, text FROM clanky ORDER BY id DESC LIMIT 1;";
$dotaz = mysql_query($sql);
$clanek = mysql_fetch_array($dotaz);
echo $clanek["text"];
};

function vypis_page($page)
{
switch ($page):
case "archiv": include("archiv.php"); break;
case "owebu2": include("neco2.php"); break;
case "owebu3": include("neco3.php"); break;
default: nenalezeno(); break;
endswitch;
};

// Samotné spuštění scriptu

$id = $_GET["id"];
$page = $_GET["page"];
include "db.php";

if ($id!=null):
vypis_clanek($id);
elseif ($page!=null):
vypis_page($page);
else:
zobraz_nejnovejsi();
endif;

mysql_Close($connect);
?>

Sem zadnej vystup neposlal ... snad

A a jak to mam vyresit ?
Uprev to aby to fungovalo :-) pls