var version = new String();

browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
if (((browserName == "Netscape")  && (browserVer >= 3)) || ((browserName == "Microsoft Internet Explorer") && (browserVer >= 3))) {
 	version = "n3";
} else {
	version = "n2";
}

if (version == "n3"){
	// top navigation
logof = new Image();
logof.src = "images/nav_logo.gif";
homef = new Image();
homef.src = "images/nav_home.gif";
productsf = new Image();
productsf.src = "images/nav_products.gif";
upcomingf = new Image();
upcomingf.src = "images/nav_upcoming.gif";
clientsf = new Image();
clientsf.src = "images/nav_clients.gif";
contactf = new Image();
contactf.src = "images/nav_contact.gif";

logon = new Image();
logon.src = "images/nav_logo_over.gif";
homen = new Image();
homen.src = "images/nav_home_over.gif";
productsn = new Image();
productsn.src = "images/nav_products_over.gif";
upcomingn = new Image();
upcomingn.src = "images/nav_upcoming_over.gif";
clientsn = new Image();
clientsn.src = "images/nav_clients_over.gif";
contactn = new Image();
contactn.src = "images/nav_contact_over.gif";

}

function img_act(imgName) {
	if (version == "n3") {
		imgOn = eval(imgName + "n.src");
		document[imgName].src = imgOn;
	}
}

function img_inact(imgName) {
	if (version == "n3") {
		document[imgName].src = eval(imgName + "f.src");
	}
}