if (document.images) {

about = new Image(); about.src = "images/nav/nav_about.gif";
about2 = new Image(); about2.src = "images/nav/nav_about_on.gif";

services = new Image(); services.src = "images/nav/nav_services.gif";
services2 = new Image(); services2.src = "images/nav/nav_services_on.gif";

products = new Image(); products.src = "images/nav/nav_benefits.gif";
products2 = new Image(); products2.src = "images/nav/nav_benefits_on.gif";

mgmt = new Image(); mgmt.src = "images/nav/nav_terms.gif";
mgmt2 = new Image(); mgmt2.src = "images/nav/nav_terms_on.gif";

contact = new Image(); contact.src = "images/nav/nav_contact.gif";
contact2 = new Image(); contact2.src = "images/nav/nav_contact_on.gif";

}

function imgOn(name) {
	if (document.images) {
	 document.images[name].src=eval(name + "2.src"); }
	}

function imgOff(name) {
	if (document.images) {
	 document.images[name].src=eval(name + ".src"); }
	}