function preLoad() {
    if (document.images) {
        pic1 = loadImage(97,27, "images/visie_hi.jpg");
        pic2 = loadImage(97,27, "images/aanbod_hi.jpg");
        pic3 = loadImage(97,27, "images/voor_wie_hi.jpg");
        pic4 = loadImage(97,27, "images/werkwijze_hi.jpg");
        pic5 = loadImage(97,27, "images/Ans_Lamers_hi.jpg");
        pic6 = loadImage(97,27, "images/contact.jpg");
    }
}

function loadImage(width, height, url) {
     pic = new Image(width, height);
     pic.src= url;
     
     return pic
}