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

	if (version == "yes") {
		btn3_1on = new Image(15, 142);
		btn3_1on.src = "./images/btn3_1b.gif";
		btn3_2on = new Image(15, 142);
		btn3_2on.src = "./images/btn3_2b.gif";
		btn3_3on = new Image(15, 142);
		btn3_3on.src = "./images/btn3_3b.gif";
		btn3_4on = new Image(15, 142);
		btn3_4on.src = "./images/btn3_4b.gif";
		btn3_5on = new Image(15, 142);
		btn3_5on.src = "./images/btn3_5b.gif";
		btn3_6on = new Image(15, 142);
		btn3_6on.src = "./images/btn3_6b.gif";
		btn3_7on = new Image(15, 142);
		btn3_7on.src = "./images/btn3_7b.gif";
		btn3_8on = new Image(15, 142);
		btn3_8on.src = "./images/btn3_8b.gif";

		btn3_1off = new Image(15, 142);
		btn3_1off.src = "./images/btn3_1a.gif";
		btn3_2off = new Image(15, 142);
		btn3_2off.src = "./images/btn3_2a.gif";
		btn3_3off = new Image(15, 142);
		btn3_3off.src = "./images/btn3_3a.gif";
		btn3_4off = new Image(15, 142);
		btn3_4off.src = "./images/btn3_4a.gif";
		btn3_5off = new Image(15, 142);
		btn3_5off.src = "./images/btn3_5a.gif";
		btn3_6off = new Image(15, 142);
		btn3_6off.src = "./images/btn3_6a.gif";
		btn3_7off = new Image(15, 142);
		btn3_7off.src = "./images/btn3_7a.gif";
		btn3_8off = new Image(15, 142);
		btn3_8off.src = "./images/btn3_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;
		}
	}