function toon(){
image = new Array(10);
image[0] = "bestanden/tumbador1/et1.jpg";
image[1] = "bestanden/tumbador1/et2.jpg";
image[2] = "bestanden/tumbador1/et3.jpg";
image[3] = "bestanden/tumbador1/et4.jpg";
image[4] = "bestanden/tumbador1/et5.jpg";
image[5] = "bestanden/tumbador1/et6.jpg";
image[6] = "bestanden/tumbador1/et7.jpg";
image[7] = "bestanden/tumbador1/et8.jpg";
image[8] = "bestanden/tumbador1/et9.jpg";
image[9] = "bestanden/tumbador1/et10.jpg";

index = Math.floor(Math.random() * image.length);
document.getElementById('toevalfoto').src = image[index];
}