// JavaScript Document
// Thanks to http://www.webmonkey.com/tutorial/Make_a_JavaScript_Slideshow

function imageItem(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 getNextImage() {
		if (random_display) {
			imageNum = randNum(0, totalImages-1);
		}
		else {
			imageNum = (imageNum+1) % totalImages;
		}
	var new_image = get_ImageItemLocation(imageArray[imageNum]);
	return(new_image);
}

function getPrevImage() {
		imageNum = (imageNum-1) % totalImages;
		var new_image = get_ImageItemLocation(imageArray[imageNum]);
		return(new_image);
}

function prevImage(place) {
		var new_image = getPrevImage();
		document[place].src = new_image;
}

	
function switchImage(place) {
		var new_image = getNextImage();
		document[place].src = new_image;
		var recur_call = "switchImage('"+place+"')";
		timerID = setTimeout(recur_call, interval);
}