var interval = 4000; 
var random_display = 0;
function imageItem1(image_location) {
this.image_item1 = new Image();
this.image_item1.src = image_location;
}
function get_imageItem1Location1(imageObj1) {
return(imageObj1.image_item1.src)
}
function randomNum(x, y) {
var range = y - x + 1;
return Math.floor(Math.random() * range) + x;
}
function getNewerImage() {
if (random_display) {
ImageNumber = randomNum(0, numberofimage-1);
}
else {
ImageNumber = (ImageNumber+1) % numberofimage;
}
var new_image1 = get_imageItem1Location1(photoArray[ImageNumber]);
return(new_image1);
}

function getPrevImage() {
ImageNumber = (ImageNumber-1) % numberofimage;
var new_image1 = get_imageItem1Location1(photoArray[ImageNumber]);
return(new_image1);
}

function prevImage(place1) {
var new_image1 = getPrevImage();
document[place1].src = new_image1;
}

function rotateImage1(place1) {
var new_image1 = getNewerImage();


document[place1].src = new_image1;

var recur_call = "rotateImage1('"+place1+"')";
timerID = setTimeout(recur_call, interval);
}