Trovato!

Ti consiglio questo javascript piuttosto che il meta tag:

Javascript Time Delay
codice:
<html>
<head>
<script type="text/javascript">
<!--
function delayer(){
document.location = "http://www.sito.it"
}
//-->
</script>
</head>
<body onLoad="setTimeout('delayer()', 5000)">

</body>
</html>
Note:
The most important part of getting the delay to work is being sure to use the javascript function setTimeout. We want the delayer() function be used after 5 seconds or 5000 miliseconds, so we pass the setTimeout() two arguments.

* 'delayer()' - The function we want setTimeout() to execute after the specified delay.
* 5000 - the number of milisecods we want setTimeout() to wait before executing our function. 1000 miliseconds = 1 second.