var imgLoaded = false;

var homeNav_active,homeNav_inactive;
var orderNav_active,orderNav_inactive;
var productsNav_active,productsNav_inactive;
var subscriptionsNav_active,subscriptionsNav_inactive;
var installationNav_active,installationNav_inactive;
var linksNav_active,linksNav_inactive;

if (document.images) {

	homeNav_active = new Image();
	homeNav_inactive = new Image();
	homeNav_active.src = 'images/nav/home_on.gif'
	homeNav_inactive.src = 'images/nav/home.gif'

	orderNav_active = new Image();
	orderNav_inactive = new Image();
	orderNav_active.src = 'images/nav/order_on.gif'
	orderNav_inactive.src = 'images/nav/order.gif'

	productsNav_active = new Image();
	productsNav_inactive = new Image();
	productsNav_active.src = 'images/nav/products_on.gif'
	productsNav_inactive.src = 'images/nav/products.gif'

	subscriptionsNav_active = new Image();
	subscriptionsNav_inactive = new Image();
	subscriptionsNav_active.src = 'images/nav/subscriptions_on.gif'
	subscriptionsNav_inactive.src = 'images/nav/subscriptions.gif'
	
	installationNav_active = new Image();
	installationNav_inactive = new Image();
	installationNav_active.src = 'images/nav/installation_on.gif'
	installationNav_inactive.src = 'images/nav/installation.gif'
	
	shippingNav_active = new Image();
	shippingNav_inactive = new Image();
	shippingNav_active.src = 'images/nav/shipping_on.gif'
	shippingNav_inactive.src = 'images/nav/shipping.gif'

	linksNav_active = new Image();
	linksNav_inactive = new Image();
	linksNav_active.src = 'images/nav/links_on.gif'
	linksNav_inactive.src = 'images/nav/links.gif'

	imgLoaded = true;
}


function imageInact(itemName) {
	if(imgLoaded)
		document.getElementById(itemName).src = eval(itemName+'_inactive.src')
}

function imageAct(itemName) {
	if(imgLoaded)
		document.getElementById(itemName).src = eval(itemName+'_active.src')
}