function organ(num) {
if (num == 3) {document.info.name.value = "bronchial tubes";document.info.func.value = "The bronchial tubes are a pair of tubes that connect the trachea to the two lungs.  The bronchial tubes branch out at the lungs into smaller tubes called bronchi and then into much smaller tubes called bronchioles, which contain small air sacs that function as the exchange points for the two gases oxygen and carbon dioxide."}
if (num == 2) {document.info.name.value = "lungs";document.info.func.value = "The lungs provide oxygen to the blood and remove carbon dioxide from the blood.  The lungs are positioned on top of the diaphragm so that the diaphragm can control the breathing of the cat by expanding and contracting."}
if (num == 1) {document.info.name.value = "pharynx";document.info.func.value = "The pharynx, also called the throat, is the place where air enters the respiratory system after entering the nose or mouth."}
if (num == 4) {document.info.name.value = "trachea";document.info.func.value = "The trachea is the tube that transports oxygen into the bronchial tubes for delivery into the lungs. The trachea is also referred to as the windpipe."}
}
function clear() {document.info.name.value = " "}