Prova così:

<html>
<head>

<script language="JavaScript">
<!--
var w=(window.screen.width - 10); var h=(window.screen.height - 40)
function aprifull(theURL,winName,altro) {
window.open(theURL,winName, "width="+w+",height="+h+",top=0,left=0");
}
//-->
</script>


<title></title>
</head>
<body>
apri
</body>
</html>

Fammi sapere,
Ciao,
dover