<!-- Start pre-loading menu images
if (document.images) {
  topbg = new Image;
  topbg.src = 'images/top_bg.png';

  index = new Image;
  index.src = 'images/menu_index-over.gif';
  agenda = new Image;
  agenda.src = 'images/menu_agenda-over.gif';
  debatcentra = new Image;
  debatcentra.src = 'images/menu_debatcentra-over.gif';	
  publiekedebat = new Image;
  publiekedebat.src = 'images/menu_publiekedebat-over.gif';
  contact = new Image;
  contact.src = 'images/menu_contact-over.gif';
}
// End -->