var loading = true;

var ie4 = ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4 ));
var ns4 = ((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 4 ));

var images = new Array(16);
for (m=0; m<=15; m++) {
        images[m] = new Image();
}

function loadpics() {

	if (ns4 || ie4) {

		images[0].src = "http://www.sydmead.com/v/01/images/2001/dot_clear.gif";
		images[1].src = "http://www.sydmead.com/images/v/04/dot-over.gif";
		images[2].src = "http://www.sydmead.com/v/01/images/2001/home/nav/bookstore-pic.gif";
		images[3].src = "http://www.sydmead.com/v/01/images/2001/home/nav/bio-pic.jpg";
		images[4].src = "http://www.sydmead.com/v/01/images/2001/home/nav/film-pic.jpg";
		images[5].src = "http://www.sydmead.com/v/01/images/2001/home/nav/anime-pic.jpg";
		images[6].src = "http://www.sydmead.com/v/01/images/2001/home/nav/appearances-pic.gif";
		images[7].src = "http://www.sydmead.com/v/01/images/2001/home/nav/oblagon-pic.gif";
		images[8].src = "http://www.sydmead.com/v/01/images/2001/home/nav/sydmead-pic.jpg";
		images[9].src = "http://www.sydmead.com/v/01/images/2001/home/nav/mailing-pic.jpg";
		images[10].src = "http://www.sydmead.com/v/01/images/2001/home/nav/features-pic.jpg";
		images[11].src = "http://www.sydmead.com/v/01/images/2001/home/nav/cartoons-pic.jpg";
		images[12].src = "http://www.sydmead.com/v/01/images/2001/home/nav/home-pic.jpg";
		images[13].src = "http://www.sydmead.com/v/01/images/2001/home/nav/sign-pic.jpg";
		images[14].src = "http://www.sydmead.com/v/01/images/2001/home/nav/view-pic.jpg";
		
		loading = false;
	}
}

function swapOff(which,image) {
	if(!loading){
		if (ns4 || ie4){
			
			if (ie4){
				eval("document.all['"+which+"'].src = images[0].src");
				eval("document.all['spotlight'].src = images[0].src");
			} else {
				eval("document."+which+".src = images[0].src");
				eval("document.spotlight.src = images[0].src");
			}
		}
	}
}

function swapOn(which,image) {
	if(!loading){
		if (ns4 || ie4){
			
			if (ie4){
				eval("document.all['"+which+"'].src = images[1].src");
				eval("document.all['spotlight'].src = images[image].src");
			} else {
				eval("document."+which+".src = images[1].src");
				eval("document.spotlight.src = images[image].src");
			}
		}
	}
}