if (document.images) {
	var img0 = new Image();
	img0.src = "../images/na0.gif";
	var img1 = new Image();
	img1.src = "../images/na1.gif";
	var img2 = new Image();
	img2.src = "../images/na2.gif";
	var img3 = new Image();
	img3.src = "../images/na3.gif";
	var img4 = new Image();
	img4.src = "../images/na4.gif";
	var img5 = new Image();
	img5.src = "../images/na5.gif";
	var img6 = new Image();
	img6.src = "../images/na6.gif";
	var img7 = new Image();
	img7.src = "../images/na7.gif";
	var img8 = new Image();
	img8.src = "../images/na8.gif";

}

function On(name) {

	if (document.images) {

		document.images['def'].src = eval(name + '.src');

	}

}

function Off() {

	if (document.images) {

		document.images['def'].src = eval(name + '.src');

	}

}