如何使用JAVASCRIPT隐藏浏览器的工具栏和菜单

<html>
<head>
<script Language="JavaScript"><!--
 
function OnlyWindow(){
    var Sw;
    var Sh;
    var z;
    Sw = screen.availwidth+5;
    Sh = screen.availHeight;
    z = window.open('index.aspx','_blank','resizable=yes,status=yes,scrollbars=yes,left=0,top=0');
    z.resizeTo(Sw,Sh);
    window.opener = self.location;
    window.close();
}
</script>
</head>
<body onload='OnlyWindow()'>
</body>
</html>