var browserName = navigator.appName;
var browserVer = parseFloat(navigator.appVersion);
var browserMac = navigator.appVersion.indexOf("Macintosh");
var browserWin = navigator.appVersion.indexOf("Win");
var allLoaded = false;
var version = "notset";

if (browserName == "Netscape" && browserVer >= 3)	
	version = "n3";
if (browserName == "Microsoft Internet Explorer"
	&& browserVer >= 3.01 && browserMac != -1)
	version = "ie3m";
if (browserName == "Microsoft Internet Explorer" && browserVer >= 4)
	version = "ie4";

var rollYes = (version == "n3" || version == "ie3m" || version == "ie4") ? true : false;

if(rollYes){
	nav01off = new Image();
	nav01off.src = dir + "images/nav/navabout1.gif";
	nav01on = new Image();
	nav01on.src = dir + "images/nav/navabout2.gif";

	nav02off = new Image();
	nav02off.src = dir + "images/nav/navserv1.gif";
	nav02on = new Image();
	nav02on.src = dir + "images/nav/navserv2.gif";

	nav03off = new Image();
	nav03off.src = dir + "images/nav/navprojects1.gif";
	nav03on = new Image();
	nav03on.src = dir + "images/nav/navprojects2.gif";

	nav04off = new Image();
	nav04off.src = dir + "images/nav/navsectors1.gif";
	nav04on = new Image();
	nav04on.src = dir + "images/nav/navsectors2.gif";

	nav05off = new Image();
	nav05off.src = dir + "images/nav/navnews1.gif";
	nav05on = new Image();
	nav05on.src = dir + "images/nav/navnews2.gif";

	nav06off = new Image();
	nav06off.src = dir + "images/nav/navemploy1.gif";
	nav06on = new Image();
	nav06on.src = dir + "images/nav/navemploy2.gif";

	nav07off = new Image();
	nav07off.src = dir + "images/nav/navcontact1.gif";
	nav07on = new Image();
	nav07on.src = dir + "images/nav/navcontact2.gif";

	allLoaded = true;
}

function rollOver(imgName){
	if (rollYes){
		if (allLoaded){
			imgOn = eval(imgName + "on.src");
			document.images[imgName].src = imgOn;
		}
	}
}

function rollOut(imgName){
	if (rollYes){
		if (allLoaded){
			imgOff = eval(imgName + "off.src");
			document.images[imgName].src = imgOff;
		}
	}
}