nav_news_off = new Image();
nav_news_off.src = "media/img/nav-news.gif";
nav_news_on = new Image();
nav_news_on.src = "media/img/nav-news-on.gif";

nav_clients_off = new Image();
nav_clients_off.src = "media/img/nav-clients.gif";
nav_clients_on = new Image();
nav_clients_on.src = "media/img/nav-clients-on.gif";

nav_about_off = new Image();
nav_about_off.src = "media/img/nav-about.gif";
nav_about_on = new Image();
nav_about_on.src = "media/img/nav-about-on.gif";

nav_services_off = new Image();
nav_services_off.src = "media/img/nav-services.gif";
nav_services_on = new Image();
nav_services_on.src = "media/img/nav-services-on.gif";

nav_contact_off = new Image();
nav_contact_off.src = "media/img/nav-contact.gif";
nav_contact_on = new Image();
nav_contact_on.src = "media/img/nav-contact-on.gif";

function navChange(button,mode) {
	document[button].src = eval(button + "_" + mode + ".src");
}