browser_name = navigator.appName;
browser_version = parseFloat(navigator.appVersion);
roll = false;

if (browser_name == "Netscape" && browser_version <= 2.0) { roll = false; }
else if (browser_name == "Netscape" && browser_version >= 3.0) { roll =
true; }
else if (browser_name == "Microsoft Internet Explorer" && browser_version
<= 2.0) { roll = false; }
else if (browser_name == "Microsoft Internet Explorer" && browser_version
>= 3.0) { roll = true; }
else { roll = true; }

if (roll) {

	navi01 = new Image;
	navi01.src = "gfx/navi-01-off.jpg";
	navi01Highlighted = new Image;
	navi01Highlighted.src = "gfx/navi-01-on.jpg";

	navi02 = new Image;
	navi02.src = "gfx/navi-02-off.jpg";
	navi02Highlighted = new Image;
	navi02Highlighted.src = "gfx/navi-02-on.jpg";
	
function imgAct(img) {
	if (roll) {
	document.images[img].src = eval(img + "Highlighted.src");
	}
}
	
function imgInact(img) {
	if (roll) {
	document.images[img].src = eval(img + ".src");
	}
}
}