if(document.images)
{  bureauon = new Image(87,22);
   bureauof = new Image(87,22);
   bureauon.src= "images/autumn_bureau_on.png";
   bureauof.src = "images/autumn_bureau_of.png";
   missieon = new Image(87,22);
   missieof = new Image(87,22);
   missieon.src= "images/autumn_missie_on.png";
   missieof.src = "images/autumn_missie_of.png"
   productenon = new Image(80,14);
   productenof = new Image(80,14);
   productenon.src= "images/autumn_producten_on.png";
   productenof.src = "images/autumn_producten_of.png"
   klantenon = new Image(87,22);
   klantenof = new Image(87,22);
   klantenon.src= "images/autumn_klanten_on.png";
   klantenof.src = "images/autumn_klanten_of.png";
   linkson = new Image(87,22);
   linksof = new Image(87,22);
   linkson.src= "images/autumn_links_on.png";
   linksof.src = "images/autumn_links_of.png";
   vacatureson = new Image(87,22);
   vacaturesof = new Image(87,22);
   vacatureson.src= "images/autumn_vacatures_on.png";
   vacaturesof.src = "images/autumn_vacatures_of.png";
   contacton = new Image(87,22);
   contactof = new Image(87,22);
   contacton.src= "images/autumn_contact_on.png";
   contactof.src = "images/autumn_contact_of.png";
}
function image_on(figuurnaam)
{  bron = eval(figuurnaam + "on.src");
   document[figuurnaam].src = bron;
}
function image_of(figuurnaam)
{  bron = eval(figuurnaam + "of.src");
   document[figuurnaam].src = bron;
}