if (top == self){
var fs =
'<frameset rows="160,*" frameborder="0" framespacing="0" border="0">'+
'<frame name="nav" src="http://www.petersletters.nl/nav.html" noresize scrolling="no">'+
'<frame name="content" src="" noresize scrolling="auto">'+
'</frameset>';
document.write(fs);
frames['content'].location.href = self.location.href;
}