var interval01 = 4000;
var random_display01 = 1;
var imageDir = "images/";

var imageNum01 = 0;
imageArray01 = new Array(); 
imageArray01[imageNum01++] = new imageItem01(imageDir + "small_gebouw(01).jpg");
imageArray01[imageNum01++] = new imageItem01(imageDir + "small_gebouw(02).jpg");
imageArray01[imageNum01++] = new imageItem01(imageDir + "small_gebouw(03).jpg");
imageArray01[imageNum01++] = new imageItem01(imageDir + "small_gebouw(04).jpg");
imageArray01[imageNum01++] = new imageItem01(imageDir + "small_gebouw(05).jpg");
imageArray01[imageNum01++] = new imageItem01(imageDir + "small_gebouw(06).jpg");
imageArray01[imageNum01++] = new imageItem01(imageDir + "small_gebouw(07).jpg");
imageArray01[imageNum01++] = new imageItem01(imageDir + "small_gebouw(08).jpg");
var totalImages01 = imageArray01.length;

function imageItem01(image_location) {  
    this.image_item = new Image();  
    this.image_item.src = image_location;  
}  
function get_ImageItemLocation(imageObj) {  
    return(imageObj.image_item.src)  
} 

function randNum(x, y) {  
    var range = y - x + 1;  
    return Math.floor(Math.random() * range) + x;  
} 

function getNextImage01() {  
imageNum01 = (imageNum01+1) % totalImages01;  

var new_image01 = get_ImageItemLocation(imageArray01[imageNum01]);  
return(new_image01);  
} 

function getSwitchImage01() {  
    if (random_display01) {  
        imageNum01 = randNum(0, totalImages01-1);  
    }  
    else {  
        imageNum01 = (imageNum01+1) % totalImages01;  
    } 

var new_image01 = get_ImageItemLocation(imageArray01[imageNum01]);  
return(new_image01);  
} 

function getPrevImage01() {
	if(imageNum01-1 < 0)
		{
			imageNum01 = totalImages01-1;
		}
	else {
		imageNum01 = (imageNum01-1) % totalImages01;
		}

var new_image01 = get_ImageItemLocation(imageArray01[imageNum01]);
return(new_image01);
} 


function prevImage01(place) {  
    var new_image01 = getPrevImage01();  
    document[place].src = new_image01;  
} 

function switchImage01(place) {  
    var new_image01 = getSwitchImage01();  
    document[place].src = new_image01;  
    var recur_call01 = "switchImage01('"+place+"')";  
    timerID01 = setTimeout(recur_call01, interval01);  
} 

function nextImage01(place) {  
    var new_image01 = getNextImage01();  
    document[place].src = new_image01;  
}