var preloadFlag = false;

myBrowser=navigator.appName
myVersion=navigator.appVersion
var version45=(myVersion.indexOf("4.")!=-1||myVersion.indexOf("5.")!=-1 || myVersion.indexOf("6.")!=-1)

var NS=(myBrowser.indexOf("Netscape")!=-1 && version45) 
var IE=(myBrowser.indexOf("Explorer")!=-1 && version45)

function setBackPage(page) {
  parent.backpage=page;
}

function getBackPage() {
	return parent.backpage;
}

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];
		}
	}
}

function preloadImages() {
	if (document.images) {

			ball = newImage("images/ball.gif");
			ball_over = newImage("images/ball_over.gif");
			ballC = newImage("images/ballC.gif");
			ballC_over = newImage("images/ballC_over.gif");
			careersm = newImage("images/careers.gif");
			careers_over = newImage("images/careers_over.gif");
			clientsm = newImage("images/clients.gif");
			clients_over = newImage("images/clients_over.gif");
			contactm = newImage("images/contact.gif");
			contact_over = newImage("images/contact_over.gif");
			corporatem = newImage("images/corporate.gif");
			corporate_over = newImage("images/corporate_over.gif");
			internetm = newImage("images/internet.gif");
			internet_over = newImage("images/internet_over.gif");
			servicesm = newImage("images/services.gif");
			services_over = newImage("images/services_over.gif");
			logom = newImage("images/logo_reg.gif");
			logon = newImage("images/logo_over.gif");

		preloadFlag = true;

	}
}