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

	if (version == "yes") {
		btn2_1on = new Image(15, 142);
		btn2_1on.src = "./images/btn2_1b.gif";
		btn2_2on = new Image(15, 142);
		btn2_2on.src = "./images/btn2_2b.gif";
		btn2_3on = new Image(15, 142);
		btn2_3on.src = "./images/btn2_3b.gif";
		btn2_4on = new Image(15, 142);
		btn2_4on.src = "./images/btn2_4b.gif";
		btn2_5on = new Image(15, 142);
		btn2_5on.src = "./images/btn2_5b.gif";
		btn2_6on = new Image(15, 142);
		btn2_6on.src = "./images/btn2_6b.gif";
		btn2_7on = new Image(15, 142);
		btn2_7on.src = "./images/btn2_7b.gif";
		btn2_8on = new Image(15, 142);
		btn2_8on.src = "./images/btn2_8b.gif";

		btn2_1off = new Image(15, 142);
		btn2_1off.src = "./images/btn2_1a.gif";
		btn2_2off = new Image(15, 142);
		btn2_2off.src = "./images/btn2_2a.gif";
		btn2_3off = new Image(15, 142);
		btn2_3off.src = "./images/btn2_3a.gif";
		btn2_4off = new Image(15, 142);
		btn2_4off.src = "./images/btn2_4a.gif";
		btn2_5off = new Image(15, 142);
		btn2_5off.src = "./images/btn2_5a.gif";
		btn2_6off = new Image(15, 142);
		btn2_6off.src = "./images/btn2_6a.gif";
		btn2_7off = new Image(15, 142);
		btn2_7off.src = "./images/btn2_7a.gif";
		btn2_8off = new Image(15, 142);
		btn2_8off.src = "./images/btn2_8a.gif";
	}

	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;
		}
	}