Prova ed aspetta 15 secondi !!!

codice:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>
<head>
<title>Untitled</title>
</head>
<body>
<script> 
<!-- 

function countDown() { 
if (document.all) 
pippo=setInterval("window.close()",15000) 
} 

window.onload = countDown; 
// --> 
</script> 
</body>
</html>