var windowWidth = 0;
var windowHeight = 0;

//Preloading images.
if (document.images) {
	var introBackground = new Image();
	introBackground.src = "images/background1_1024.jpg";
	var contentBackground = new Image();
	contentBackground.src = "images/background2_1024.jpg";

	var contentCanvas = new Image();
	contentCanvas.src = "images/contentCanvas.png";

	var menuLogoBg = new Image();
	menuLogoBg.src = "images/menuLogoBg.png";

	var menu1Bg = new Image();
	menu1Bg.src = "images/menu1Bg.png";
	var menu2Bg = new Image();
	menu2Bg.src = "images/menu2Bg.png";
	var menu3Bg = new Image();
	menu3Bg.src = "images/menu3Bg.png";
	var menu4Bg = new Image();
	menu4Bg.src = "images/menu4Bg.png";
	var menu5Bg = new Image();
	menu5Bg.src = "images/menu5Bg.png";
}

if (window.innerHeight) {
	//Non-IE
	windowHeight = window.innerHeight;
	windowWidth = window.innerWidth;
}
else if (document.documentElement && document.documentElement.clientHeight) {
	//IE 6+ in 'standards compliant mode'
	windowHeight = document.documentElement.clientHeight;
	windowWidth = document.documentElement.clientWidth;
}
else if (document.body) {
	//IE 4 compatible
	windowHeight = document.body.clientHeight;
	windowWidth = document.body.clientWidth;
}