if(parent.frames.length == 0){
document.write('<frameset framespacing="0" border="0" rows="35,*" frameborder="0">'
+ '  <frame name="boven" src="http://www.computermeester.be/navigatie-vlaanderen.htm" scrolling="auto" target="hoofd">'
+ '  <frame name="onder" src="' + window.location +'?" scrolling="auto">'
+ '</frameset>');
}