// preload rollovers
image = new Image();
image.src = "/_assets/images/buttons/nav_btn_about_on.gif";
image = new Image();
image.src = "/_assets/images/buttons/nav_btn_catalog_on.gif";
image = new Image();
image.src = "/_assets/images/buttons/nav_btn_contact_on.gif";
image = new Image();
image.src = "/_assets/images/buttons/nav_btn_rentals_on.gif";
image = new Image();
image.src = "/_assets/images/buttons/nav_btn_service_on.gif";
image = new Image();
image.src = "/_assets/images/buttons/nav_btn_specials_on.gif";
image = new Image();
image.src = "/_assets/images/buttons/nav_btn_used_on.gif";
image = new Image();
image.src = "/_assets/images/buttons/nav_btn_welcome_on.gif";
image = new Image();
image.src = "/_assets/images/buttons/btn_cart_on.gif";
image = new Image();
image.src = "/_assets/images/buttons/btn_search_on.gif";
image = new Image();
image.src = "/_assets/images/buttons/button_buy_now_on.gif";
image = new Image();
image.src = "/_assets/images/buttons/button_checkout_on.gif";
image = new Image();
image.src = "/_assets/images/buttons/button_confirm_order_on.gif";
image = new Image();
image.src = "/_assets/images/buttons/button_continue_on.gif";
image = new Image();
image.src = "/_assets/images/buttons/button_login_on.gif";
image = new Image();
image.src = "/_assets/images/buttons/button_continue_shopping_on.gif";
image = new Image();
image.src = "/_assets/images/buttons/button_update_cart_on.gif";
image = new Image();
image.src = "/_assets/images/buttons/button_change_address_on.gif";
image = new Image();
image.src = "/_assets/images/buttons/designed_by_rhubarb_on.gif";

// add "_on" to the gifs
function rollon(link) {
	var img = link.getElementsByTagName("img");
	img = img[0];
	if(!img.src.match(/_on\.gif$/)) {
		img.src = img.src.replace(".gif", "_on.gif");
	}
}

// remove "_on" from the gifs
function rolloff(link) {
	var img = link.getElementsByTagName("img");
	img = img[0];
	img.src = img.src.replace(/_on\.gif$/, ".gif");
}