if(top == self){
document.write(
'<frameset rows="*" cols="*,786,*" border="0" />'
+ '<frame src="fr_achtergrond.htm" name="left" scrolling="no" marginwidth="0" marginheight="0" />'
+ '<frame src="' + window.location +'?" name="content" />'
+ '<frame src="fr_achtergrond.htm" name="right" scrolling="NO" />'
+ '</frameset />');
}