// stien til en mappe hvor billederne ligger i.
 
var url = "https://gudenaasammenslutningen.dk/billeder/statbilleder";
 
var pictureArray = new Array();
pictureArray[0] = "18276.jpeg";
pictureArray[1] = "18277.jpeg";
pictureArray[2] = "18282.jpeg";
pictureArray[3] = "18283.jpg";
pictureArray[4] = "18284.jpg";
pictureArray[5] = "18285.jpg";
pictureArray[6] = "18287.jpeg";
pictureArray[7] = "18288.jpeg";
pictureArray[8] = "18293.jpeg";
pictureArray[9] = "18294.jpeg";
pictureArray[10] = "18298.jpg";
pictureArray[11] = "18300.jpeg";
pictureArray[12] = "18301.jpg";
pictureArray[13] = "18302.jpg";
pictureArray[14] = "18303.jpg";
pictureArray[15] = "18304.jpg";
pictureArray[16] = "18305.jpg";
pictureArray[17] = "18306.jpg";
pictureArray[18] = "18307.jpg";
pictureArray[19] = "18308.jpg";
pictureArray[20] = "18312.jpg";
 
var imagePreloader = new Array();
 
function randomPicture(interval,amount) {  
   for (i = 1; i<=pictureArray.length; i++) {
    var image = new Image();
    image.src = url + "/"+ pictureArray[i-1];
    imagePreloader[i-1] = image;
   }
var layout = "";
   for (j = 0; j < amount; j++) {
var rnd = Math.round(Math.random() * (imagePreloader.length -1));
var imgSrc = imagePreloader[rnd].src;
layout += "<td><img id=\"random_image"+ j +"\" src=\""+ imgSrc +"\"  title=\"\" Width=\"100%\"></td>";
   }
    layout = '<table><tr>' + layout +'</tr></table>';
   document.write (layout);
   setInterval ("updateImage("+ amount +")", interval);
}



function updateImage(amount) {
  for (i = 0; i < amount; i++ ) {
   var rnd = Math.round(Math.random() * (imagePreloader.length -1));
   var imgSrc = imagePreloader[rnd].src;
   document.getElementById('random_image'+i).src = imgSrc;
  }
}