browserName = navigator.appName;
	browserVer = parseInt(navigator.appVersion);
	if ((browserName == "Netscape" && browserVer >= 3) | (browserVer >=4)) version ="yes";
		else version = "no";

	if (version == "yes") {
		btn1on = new Image(32, 142);
		btn1on.src = "./images/btn1_b.jpg";
		btn2on = new Image(32, 142);
		btn2on.src = "./images/btn2_b.jpg";
		btn3on = new Image(32, 142);
		btn3on.src = "./images/btn3_b.jpg";
		btn4on = new Image(32, 142);
		btn4on.src = "./images/btn4_b.jpg";
		btn5on = new Image(32, 142);
		btn5on.src = "./images/btn5_b.jpg";
		btn6on = new Image(32, 142);
		btn6on.src = "./images/btn6_b.jpg";
		btn7on = new Image(32, 142);
		btn7on.src = "./images/btn7_b.jpg";
		btn8on = new Image(32, 142);
		btn8on.src = "./images/btn8_b.jpg";
		btn9on = new Image(32, 142);
		btn9on.src = "./images/btn9_b.jpg";

		btn1off = new Image(32, 142);
		btn1off.src = "./images/btn1_a.jpg";
		btn2off = new Image(32, 142);
		btn2off.src = "./images/btn2_a.jpg";
		btn3off = new Image(32, 142);
		btn3off.src = "./images/btn3_a.jpg";
		btn4off = new Image(32, 142);
		btn4off.src = "./images/btn4_a.jpg";
		btn5off = new Image(32, 142);
		btn5off.src = "./images/btn5_a.jpg";
		btn6off = new Image(32, 142);
		btn6off.src = "./images/btn6_a.jpg";
		btn7off = new Image(32, 142);
		btn7off.src = "./images/btn7_a.jpg";
		btn8off = new Image(32, 142);
		btn8off.src = "./images/btn8_a.jpg";
		btn9off = new Image(32, 142);
		btn9off.src = "./images/btn9_a.jpg";
	}

	function img_act(imgName) {
		if (version == "yes") {
			imgOn = eval(imgName + "on.src");
			document [imgName].src = imgOn;
		}
	}

	function img_inact(imgName) {
		if (version == "yes") {
			imgOff = eval(imgName + "off.src");
			document [imgName].src = imgOff;
		}
	}