if (document.images) {

//rollovers
		center = new Image();
		center_down = new Image();
		services = new Image();
		services_down = new Image();
		healing = new Image();
		healing_down = new Image();
		getinvolved = new Image();
		getinvolved_down = new Image();
		testimonials = new Image();
		testimonials_down = new Image();
		contact = new Image();
		contact_down = new Image();

//rollovers
		center.src = "_images/nav-center-2.gif";
		center_down.src = "_images/nav-center-3.gif";
		services.src = "_images/nav-services-0.gif";
		services_down.src = "_images/nav-services-1.gif";
		healing.src = "_images/nav-healing-0.gif";
		healing_down.src = "_images/nav-healing-1.gif";
		getinvolved.src = "_images/nav-getinvolved-0.gif";
		getinvolved_down.src = "_images/nav-getinvolved-1.gif";
		testimonials.src = "_images/nav-testimonials-0.gif";
		testimonials_down.src = "_images/nav-testimonials-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")
		}
	}