//preload rollover images
if (document.images) {
	history_button = new Image(72,66); 
	history_button.src="images/nav_history_over.jpg";
	method = new Image(102,66); 
	method.src="images/nav_method_over.jpg";
	benefits = new Image(80,66); 
	benefits.src="images/nav_benefits_over.jpg";
	getstarted = new Image(103,66); 
	getstarted.src="images/nav_getstarted_over.jpg";
	dances = new Image(99,66); 
	dances.src="images/nav_dances_over.jpg";
	faqs = new Image(62,66); 
	faqs.src="images/nav_faqs_over.jpg";
	locations = new Image(86,66); 
	locations.src="images/nav_locations_over.jpg";
	contact = new Image(88,66); 
	contact.src="images/nav_contact_over.jpg";
	studios = new Image(120,66); 
	studios.src="images/nav_studios_over.jpg";
	roxbury = new Image(208,38); 
	roxbury.src="images/nav_right_roxbury_over.jpg";
	kenilworth = new Image(208,83); 
	kenilworth.src="images/nav_right_kenilworth_over.jpg";
	denville = new Image(208,73); 
	denville.src="images/nav_right_denville_over.jpg";
	chatham = new Image(208,92); 
	chatham.src="images/nav_right_chatham_over.jpg";

}