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";



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) {
		about_over = newImage("images/about-over.gif");
		service_over = newImage("images/service-over.gif");
		project_over = newImage("images/project-over.gif");
		sector_over = newImage("images/sector-over.gif");
		news_over = newImage("images/news-over.gif");
		employ_over = newImage("images/employ-over.gif");
		contact_over = newImage("images/contact-over.gif");
		preloadFlag = true;
	}
}