var interval = 2000;
			var random_display = 0;
			var imageDir = "images/";
			var imageNum = 0;
			imageArray = new Array();
			imageArray[imageNum++] = new imageItem(imageDir + "redPond1.gif");
			imageArray[imageNum++] = new imageItem(imageDir + "redPond2.gif");
			imageArray[imageNum++] = new imageItem(imageDir + "redPond3.gif");
			imageArray[imageNum++] = new imageItem(imageDir + "redPond4.gif");
			imageArray[imageNum++] = new imageItem(imageDir + "redPond5.gif");
			imageArray[imageNum++] = new imageItem(imageDir + "redPond6.gif");
			imageArray[imageNum++] = new imageItem(imageDir + "redPond7.gif");
			imageArray[imageNum++] = new imageItem(imageDir + "redPond8.gif");
			imageArray[imageNum++] = new imageItem(imageDir + "redPond9.gif");
			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 switchImage(place) {
				var new_image = getNextImage();
				document[place].src = new_image;
				var recur_call = "switchImage('"+place+"')";
				timerID = setTimeout(recur_call, interval);
		        }