if (document.images) {

//rollovers
		about = new Image();
		about_down = new Image();
		services = new Image();
		services_down = new Image();
		testimonials = new Image();
		testimonials_down = new Image();
		articles = new Image();
		articles_down = new Image();
		news = new Image();
		news_down = new Image();
		contact = new Image();
		contact_down = new Image();

//rollovers
		about.src = "/_images/nav-about-0.gif";
		about_down.src = "/_images/nav-about-1.gif";
		services.src = "/_images/nav-services-0.gif";
		services_down.src = "/_images/nav-services-1.gif";
		testimonials.src = "/_images/nav-testimonials-0.gif";
		testimonials_down.src = "/_images/nav-testimonials-1.gif";
		articles.src = "/_images/nav-articles-0.gif";
		articles_down.src = "/_images/nav-articles-1.gif";
		news.src = "/_images/nav-news-0.gif";
		news_down.src = "/_images/nav-news-1.gif";
		contact.src = "/_images/nav-contact-0.gif";
		contact_down.src = "/_images/nav-contact-1.gif";

}

function buttonOn(imageName) {
	if (document.images) {
		document[imageName].src = eval(imageName+"_down.src")
		}
	}

function buttonOff(imageName) {
	if (document.images) {
		document[imageName].src = eval(imageName+".src")
		}
	}