var position = 0;
var directory = "images/slideshow/";
var gallery = new Array(
	new Array("201.jpg", "Classroom 201."),
	new Array("Conf Room.jpg", "Conference Room."),
	new Array("Lab.jpg", "Computer Lab."),
	new Array("garden.png", "Center Grounds. "),
	new Array("garden1.png", "Center Grounds. "),
	new Array("garden2.png", "Center Grounds. "),
	new Array("garden3.png", "Center Grounds. "),
	new Array("garden4.png", "Center Grounds. ") );

var isInit = false;

function initSlideshow() {
	img = document.getElementById('currentImage');
	img.src = directory + gallery[position][0];

	document.getElementById('caption').innerHTML = gallery[position][1];
}

function prevImage() {
	if (!isInit) {
		initSlideshow();
		isInit = true;
	}
	
	(position > 0) ? position-- : position = gallery.length - 1;
	
	img = document.getElementById('currentImage');
	img.src = directory + gallery[position][0];
	
	document.getElementById('caption').innerHTML = gallery[position][1];
}

function nextImage() {
	if (!isInit) {
		initSlideshow();
		isInit = true;
	}
	
	(position < gallery.length - 1) ? position++ : position = 0;

	img = document.getElementById('currentImage');
	img.src = directory + gallery[position][0];
	
	document.getElementById('caption').innerHTML = gallery[position][1];
}