Scusate ho trovato la soluzione.
La posto cosi magari è utile ad altre persone:-)


<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<script language="JavaScript">
function fullscr(){
window.open("index.htm","","fullscreen=yes",",scro llbars=no")
}
</script>
</head>

<body onLoad="fullscr()">
</body>
</html>

#

<html>
<head>
<title>TITOLO PAGINA</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>

<body bgcolor="#00CCFF" topmargin="0" bottonmargin="0" leftmargin="0" rightmargin="0" scroll=no>
</body>
</html>