var interval = 3000;
	var random_display = 0;
	var imageDir = "image_ad/";
	
    var imageNum = 0;
	imageArray = new Array();
	imageArray[imageNum++] = new imageItem(imageDir + "nwar3650.jpg", "http://www.addon-tech.com/new/product_info.php?id=131");
//	imageArray[0].href = "http://www.addon-tech.com/new/product_info.php?id=103";
    imageArray[imageNum++] = new imageItem(imageDir + "hp2000.jpg", "http://www.addon-tech.com/new/product_info.php?id=104");
//	imageArray[1].href = "http://www.addon-tech.com/new/product_info.php?id=42";
	//imageArray[imageNum++] = new imageItem(imageDir + "03.jpg");
	//imageArray[imageNum++] = new imageItem(imageDir + "04.jpg");
	//imageArray[imageNum++] = new imageItem(imageDir + "05.jpg");
	
    var totalImages = imageArray.length; 
    
    function imageItem(image_location, url) {
		this.image_item = new Image();
		this.image_item.src = image_location;
		this.url = url;
	}
	function get_ImageItemLocation(imageObj) {
		return(imageObj.image_item.src);
	}
	
	function get_ImageItemURL(imageObj) {
		return(imageObj.url);
	}
	
	function openLink()
	{
  	//	imageNum = (imageNum) % totalImages;
		var link = get_ImageItemURL(imageArray[imageNum]);
  		if (link!=0)
  		{
    		window.open(link);
  		}
	}
	
	
	function getNextImage() {
	
	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);
        }


// JavaScript Document