Google Twój przyjaciel
javascript+location+href+delay<!-- BEGIN SCRIPT -->
<meta http-equiv="refresh" content="15; url=target.html">
<!--
var version = parseInt(navigator.appVersion)
// replace is supported
if (version>=4 || window.location.replace)
setTimeout("window.location.replace('target.html')",15000);
else
window.location.href = "target.html"
// -->
<!-- END SCRIPT -->
albo drugi przykład, to już sobie wybierzesz
<script language="javascript"> function popup() {
alert("There's the popup!");
}
function startTimer() {
var timer;
timer=setTimeout("popup()", 4000);
}