/**
 * @author pvance
 */
var interval = 5000;
var random_display = 0;
var imageDir = "images/home/image";

var imageNum = 0;
imageArray = new Array();
imageArray[imageNum++] = new imageItem(imageDir + "1.jpg");
imageArray[imageNum++] = new imageItem(imageDir + "2.jpg");
imageArray[imageNum++] = new imageItem(imageDir + "3.jpg");
imageArray[imageNum++] = new imageItem(imageDir + "4.jpg");
imageArray[imageNum++] = new imageItem(imageDir + "5.jpg");
imageArray[imageNum++] = new imageItem(imageDir + "6.jpg");
imageArray[imageNum++] = new imageItem(imageDir + "7.jpg");
imageArray[imageNum++] = new imageItem(imageDir + "8.jpg");
imageArray[imageNum++] = new imageItem(imageDir + "9.jpg");
imageArray[imageNum++] = new imageItem(imageDir + "10.jpg");

var totalImages = imageArray.length;
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);
}