function newImage(arg) {
		    if (document.images) {
		        rslt = new Image();
		        rslt.src = arg;
		        return rslt;
		    }
		}
		
		function changeImages() {
		    if (document.images && (preloadFlag == true)) {
		        for (var i=0; i<changeImages.arguments.length; i+=2) {
		            document[changeImages.arguments[i]].src = 
		                changeImages.arguments[i+1];
		        }
		    }
		}
		
		var preloadFlag = false;
		function preloadImages() {
		    if (document.images) {
		        right_on = newImage("images/nav_rightforyou_on.gif");
						about_on = newImage("images/nav_about_on.gif");
						downloadable_on = newImage("images/nav_downloadable_on.gif");
						how_on = newImage("images/nav_how_on.gif");
		        preloadFlag = true;
		    }
		}
		
		
image1 = new Image();
image1.src = "nav_rightforyou_off.gif";

image2 = new Image();
image2.src = "nav_how_off.gif";

image3 = new Image();
image3.src = "nav_downloadable_off.gif";

image4 = new Image();
image4.src = "nav_about_off.gif";

image5 = new Image();
image5.src = "logo_aao.gif";

image6 = new Image();
image6.src = "copyright_top_curve.gif";

image7 = new Image();
image7.src = "copyright_bottom_curve.gif";

image8 = new Image();
image8.src = "copyright_bottom_l_curve.gif";

image9 = new Image();
image9.src = "copyright_bottom_r_curve.gif";