Ohhhhhhhhhhhhhhhhhhhhh
finalmente ho trovato qualcosa che fa per me:

Codice PHP:
<?php
//*****************************************************************************
//
// MICRO COUNTDOWN  -  Version: 1.0
//
// You may use this code or any modified version of it on your website.
//
// NO WARRANTY
// This code is provided "as is" without warranty of any kind, either
// expressed or implied, including, but not limited to, the implied warranties
// of merchantability and fitness for a particular purpose. You expressly
// acknowledge and agree that use of this code is at your own risk.
//
//*****************************************************************************
?>


<?php
// Define your target date here
    $targetYear  = 2007;
    $targetMonth = 12;
    $targetDay   = 10;
    $targetHour  = 12;
    $targetMinute= 00;
    $targetSecond= 00;
// End target date definition

// Define date format
$dateFormat = "Y-m-d H:i:s";

$targetDate = mktime($targetHour,$targetMinute,$targetSecond,$targetMonth,$targetDay,$targetYear);
$actualDate = time();

$secondsDiff = $targetDate - $actualDate;

$remainingDay     = floor($secondsDiff/60/60/24);
$remainingHour    = floor(($secondsDiff-($remainingDay*60*60*24))/60/60);
$remainingMinutes = floor(($secondsDiff-($remainingDay*60*60*24)-($remainingHour*60*60))/60);
$remainingSeconds = floor(($secondsDiff-($remainingDay*60*60*24)-($remainingHour*60*60))-($remainingMinutes*60));

$targetDateDisplay = date($dateFormat,$targetDate);
$actualDateDisplay = date($dateFormat,$actualDate);

?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Max's Countdown System</title>
<link href="style/style.css" rel="stylesheet" type="text/css" />
<script type="text/javascript">
  var days = <?php echo $remainingDay; ?>  
  var hours = <?php echo $remainingHour; ?>  
  var minutes = <?php echo $remainingMinutes; ?>  
  var seconds = <?php echo $remainingSeconds; ?>  

function setCountDown ()
{
  seconds--;
  if (seconds < 0){
      minutes--;
      seconds = 59
  }
  if (minutes < 0){
      hours--;
      minutes = 59
  }
  if (hours < 0){
      days--;
      hours = 23
  }
  document.getElementById("remain").innerHTML = days+" days, "+hours+" hours, "+minutes+" minutes, "+seconds+" seconds";
  setTimeout ( "setCountDown()", 1000 );
}

</script>
</head>

<body onload="setCountDown();">
<div id="container">
    <div id="header"><div id="header_left"></div>
    <div id="header_main">Max's Countdown System</div><div id="header_right"></div></div>
    <div id="content">
        <table class="countTable">
           <tr><td>Target date:</td><td><?php echo $targetDateDisplay; ?></td></tr>
           <tr><th colspan="2" id="remain"><?php echo "$remainingDay days, $remainingHour hours, $remainingMinutes minutes, $remainingSeconds seconds";?></th></tr>
           <tr><td>Actual date:</td><td><?php echo $actualDateDisplay; ?></td></tr>
       </table>
    </div>
    <div id="footer">[url="http://www.phpf1.com"]Powered by PHP F1[/url]</div>
</div>
</body>
</html>
Io vorrei sapere, come posso fare per farlo indirizzare su un altra pagina quando il conto alla rovescia arriva a 0secondi?
diciamo quando finisce di contare...
perfavore rispondetemi