var interval = 1500;
var random_display = 0;
var imageDir = "/images/gallery/";

	

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;
		}

		updateSelected(imageNum);

		var new_image = get_ImageItemLocation(imageArray[imageNum]);
		return(new_image);

	}


function getPrevImage() {
		
		if (imageNum <=0){
		
		imageNum = totalImages
		
		}
		
		imageNum = (imageNum-1) % totalImages;
		
		updateSelected(imageNum);
		
		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);
        }

	function changeImage(img) {

		var new_image = get_ImageItemLocation(imageArray[img]);
		document.slideImg.src = new_image;
		imageNum = img;

		updateSelected(img);
		
		//document[place].src = new_image;		
        }


function updateSelected(imgnum)
{

for ( var i=0, len=totalImages; i<len; ++i ){
  document.getElementById('gallery'+i).className = 'galleryinactive'; 
}

  document.getElementById('gallery'+imgnum).className = 'galleryactive'; 

}
	

function updatepanel(dir,imgnum)
{
	imgdir='/images/gallery/'+dir+'/'+dir+'-'+imgnum+'.jpg';
	//alert(imgnum);
	document.slideshow.src = imgdir;   
}