var onImage = new Array()
		
		onImage["image1"] = new Image()
		onImage["image1"].src = "images/arlington/arlington1.jpg";
		
		onImage["image2"] = new Image()
		onImage["image2"].src = "images/arlington/arlington2.jpg";

		onImage["image3"] = new Image()
		onImage["image3"].src = "images/arlington/arlington3.jpg";

		onImage["image4"] = new Image()
		onImage["image4"].src = "images/arlington/arlington4.jpg";
		
		onImage["image5"] = new Image()
		onImage["image5"].src = "images/arlington/arlington5.jpg";

		onImage["image6"] = new Image()
		onImage["image6"].src = "images/arlington/arlington6.jpg";

		onImage["image7"] = new Image()
		onImage["image7"].src = "images/arlington/arlington7.jpg";
		
		onImage["image8"] = new Image()
		onImage["image8"].src = "images/arlington/arlington8.jpg";

		onImage["image9"] = new Image()
		onImage["image9"].src = "images/arlington/arlington9.jpg";
		
		onImage["image10"] = new Image()
		onImage["image10"].src = "images/arlington/arlington10.jpg";
		
		onImage["image11"] = new Image()
		onImage["image11"].src = "images/arlington/arlington11.jpg";

		onImage["image12"] = new Image()
		onImage["image12"].src = "images/arlington/arlington12.jpg";
		
		/* the following functions set the image src to the corresponding
		image in the onImage and offImage array, replacing the spacer
		with the new image. */
		
		function showOn(imgName) {
		document.images["spacer"].src = onImage[imgName].src
		
		}
		
		function showOff() {
		document.images["spacer"].src = offImage["spacer"].src 
		}