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 getNextImageNext() {
	if(ImageNum == number_of_image){
		ImageNum = 1;
	} else {
		ImageNum++;
	}
	
	var new_image = get_ImageItemLocation(imageArray[ImageNum]);
	return(new_image);
}

function getNextImage() {
	if(ImageNum == number_of_image){
		gotoNewTab();
	} else {
		ImageNum++;
	}
	var new_image = get_ImageItemLocation(imageArray[ImageNum]);
	return(new_image);
}
function getPrevImage() {
	if(ImageNum == 1){
		ImageNum = number_of_image;
	} else {
		ImageNum--;
	}
var new_image = get_ImageItemLocation(imageArray[ImageNum]);
return(new_image);
}

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

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

function rotateImageNext(place) {
	var new_image = getNextImageNext();
	document[place].src = new_image;
}

function getQueryVariable(variable) {
  var query = window.location.search.substring(1);
  var vars = query.split("&");
  for (var i=0;i<vars.length;i++) {
    var pair = vars[i].split("=");
    if (pair[0] == variable) {
      return pair[1];
    }
  } 
}

function startauto(){
 if(getQueryVariable("play") == 1){
 	var ImageNum = 0;
 	rotateImage('rImage');
 }
}