function preloadImages(){
	image1 = new Image(); image1.src = "images/menu-btn-home-over.png";
	image2 = new Image(); image2.src = "images/menu-btn-castles-over.png";
	image3 = new Image(); image3.src = "images/menu-btn-hire-over.png";
	image4 = new Image(); image4.src = "images/menu-btn-fundraising-over.png";
	image5 = new Image(); image5.src = "images/menu-btn-contact-over.png";
	image6 = new Image(); image6.src = "images/menu-btn-jumping-castle-home-over.png";
}