if (document.images) {

image1N= new Image(199,30);
image1N.src= 'images/klimmateriaal2.jpg';

image1H= new Image(199,30);
image1H.src= 'images/klimmateriaal1.jpg';

image2N= new Image(199,30);
image2N.src= 'images/wagenpark2.jpg';

image2H= new Image(199,30);
image2H.src= 'images/wagenpark1.jpg';

image3N= new Image(199,30);
image3N.src= 'images/machines2.jpg';

image3H= new Image(199,30);
image3H.src= 'images/machines1.jpg';

}