if (document.images) {

	home_over = new Image();
	home_over.src = "images/nav_home-over.gif";
	home_off = new Image();
	home_off.src = "images/nav_home.gif";
	
	services_over = new Image();
	services_over.src = "images/nav_services-over.gif";
	services_off = new Image();
	services_off.src = "images/nav_services.gif";
	
	events_over = new Image();
	events_over.src = "images/nav_events-over.gif";
	events_off = new Image();
	events_off.src = "images/nav_events.gif";
	
	clients_over = new Image();
	clients_over.src = "images/nav_clients-over.gif";
	clients_off = new Image();
	clients_off.src = "images/nav_clients.gif";
	
	about_over = new Image();
	about_over.src = "images/nav_about-over.gif";
	about_off = new Image();
	about_off.src = "images/nav_about.gif";

	
	contact_over = new Image();
	contact_over.src = "images/nav_contact-over.gif";
	contact_off = new Image();
	contact_off.src = "images/nav_contact.gif";
}

function roll(name,state) {
	document.images[name].src = eval(name + "_" + state + ".src");
}