errore codice popup

[oliweb]

salve sulla home di joomla vorrei inserire il seguente codice popup

<script>
newwindow=window.open("avviso.asp","newWin","scrollbars=no,status=no,resizable=no,top=250,left=420,width=420,height=445")
newwindow.creator=self

</script>

la pagina index.php è la seguente:

<?php
/**
* @version		$Id: index.php 14401 2010-01-26 14:10:00Z louis $
* @package		Joomla
* @copyright	Copyright (C) 2005 - 2010 Open Source Matters. All rights reserved.
* @license		GNU/GPL, see LICENSE.php
* Joomla! is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
* See COPYRIGHT.php for copyright notices and details.
*/

// Set flag that this is a parent file
define( '_JEXEC', 1 );

define('JPATH_BASE', dirname(__FILE__) );

define( 'DS', DIRECTORY_SEPARATOR );

require_once ( JPATH_BASE .DS.'includes'.DS.'defines.php' );
require_once ( JPATH_BASE .DS.'includes'.DS.'framework.php' );

JDEBUG ? $_PROFILER->mark( 'afterLoad' ) : null;

/**
 * CREATE THE APPLICATION
 *
 * NOTE :
 */
$mainframe =& JFactory::getApplication('site');

/**
 * INITIALISE THE APPLICATION
 *
 * NOTE :
 */
// set the language
$mainframe->initialise();

JPluginHelper::importPlugin('system');

// trigger the onAfterInitialise events
JDEBUG ? $_PROFILER->mark('afterInitialise') : null;
$mainframe->triggerEvent('onAfterInitialise');

/**
 * ROUTE THE APPLICATION
 *
 * NOTE :
 */
$mainframe->route();

// authorization
$Itemid = JRequest::getInt( 'Itemid');
$mainframe->authorize($Itemid);

// trigger the onAfterRoute events
JDEBUG ? $_PROFILER->mark('afterRoute') : null;
$mainframe->triggerEvent('onAfterRoute');

/**
 * DISPATCH THE APPLICATION
 *
 * NOTE :
 */
$option = JRequest::getCmd('option');
$mainframe->dispatch($option);

// trigger the onAfterDispatch events
JDEBUG ? $_PROFILER->mark('afterDispatch') : null;
$mainframe->triggerEvent('onAfterDispatch');

/**
 * RENDER  THE APPLICATION
 *
 * NOTE :
 */
$mainframe->render();

// trigger the onAfterRender events
JDEBUG ? $_PROFILER->mark('afterRender') : null;
$mainframe->triggerEvent('onAfterRender');

/**
 * RETURN THE RESPONSE
 */
echo JResponse::toString($mainframe->getCfg('gzip'));

ho provato ma inserire quel codice in alto però mi da il seguente errore:

Warning: Cannot modify header information - headers already sent by (output started at /root/index.php:1) in /root/libraries/joomla/session/session.php on line 426

come posso inserire il popup sul sito senza moduli o plugin?

Grazie

[oliweb]

<script>
newwindow=window.open("avviso.asp","newWin","scrollbars=no,status=no,resizable=no,top=250,left=420,width=420,height=445")
newwindow.creator=self

</script>

la pagina è avviso.html e non avviso.asp

[Dascos]

Argh...
Inserire del codice html nella index di joomla...è da pazzi furiosi!
Devi modificarti il componente/modulo/template corretto, non puoi mettere fondamentalmente a caso della roba e sperare che funzioni come pensi...