function loadImages() {
	home_on = new Image();
	home_on.src = "./interface/button-home2.gif";
	people_on = new Image();
	people_on.src = "./interface/button-people2.gif";
	research_on = new Image();
	research_on.src = "./interface/button-research2.gif";
	photos_on = new Image();
	photos_on.src = "./interface/button-photos2.gif";
	links_on = new Image();
	links_on.src = "./interface/button-links2.gif";
	contact_on = new Image();
	contact_on.src = "./interface/button-contact2.gif";
}

if (document.images) {
	loadImages();
}


function changeImage(image, x) {
	document[image].src = "./interface/button-" + image + x + ".gif";
}