// JavaScript Document

var imgArr = new Array();
var pageLoaded = false;
var downonce = false;
var tempImage = new Image();

window.onload = function () {
	imgArr["home"] = newImage("/images/n_home_dn.gif");
	imgArr["wines"] = newImage("/images/n_wines_dn.gif");
	imgArr["winemaking"] = newImage("/images/n_winemaking_dn.gif");
	imgArr["estate"] = newImage("/images/n_estate_dn.gif");
	imgArr["order"] = newImage("/images/n_order_dn.gif");
	imgArr["contact"] = newImage("/images/n_contact_dn.gif");
	imgArr["trade"] = newImage("/images/n_trade_dn.gif");
	
	pageLoaded = true;
}

function imgDn(imgName) {
	if (!pageLoaded) return;
	
	tempImage.src = document.images[imgName].src;
	document.images[imgName].src = imgArr[imgName].src;
	imgArr[imgName].src = tempImage.src;
	
	downonce = true;
}

function imgUp(imgName) {
	if (!pageLoaded || !downonce) return;
	
	tempImage.src = document.images[imgName].src;
	document.images[imgName].src = imgArr[imgName].src;
	imgArr[imgName].src = tempImage.src;
}

function newImage(imgURL) {
	var img = new Image();
	img.src = imgURL;
	return img;
}