//preloading navigation
		introon = new Image();
		introon.src = "./images/intro_1.gif";
		introoff = new Image();
		introoff.src = "./images/intro_0.gif";
		homeon = new Image();
		homeon.src = "../images/n_home_1.gif";
		homeoff = new Image();
		homeoff.src = "../images/n_home_0.gif";
		abouton = new Image();
		abouton.src = "../images/n_about_1.gif";
		aboutoff = new Image();
		aboutoff.src = "../images/n_about_0.gif";
		profileson = new Image();
		profileson.src = "../images/n_profiles_1.gif";
		profilesoff = new Image();
		profilesoff.src = "../images/n_profiles_0.gif";
		projectson = new Image();
		projectson.src = "../images/n_projects_1.gif";
		projectsoff = new Image();
		projectsoff.src = "../images/n_projects_0.gif";
		whyon = new Image();
		whyon.src = "../images/n_why_1.gif";
		whyoff = new Image();
		whyoff.src = "../images/n_why_0.gif";
		contacton = new Image();
		contacton.src = "../images/n_contact_1.gif";
		contactoff = new Image();
		contactoff.src = "../images/n_contact_0.gif";


function rollOn(button) {
	if (document.images) {
	document.images[button].src = eval(button + "on.src");
	}
}

function rollOff(button) {
	if (document.images) {
	document.images[button].src = eval(button + "off.src");
	}
}