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

	if (version == "yes") {
		btn5_1on = new Image(15, 142);
		btn5_1on.src = "./images/btn5_1b.gif";
		btn5_2on = new Image(15, 142);
		btn5_2on.src = "./images/btn5_2b.gif";
		btn5_3on = new Image(15, 142);
		btn5_3on.src = "./images/btn5_3b.gif";
		btn5_4on = new Image(15, 142);
		btn5_4on.src = "./images/btn5_4b.gif";
		btn5_5on = new Image(15, 142);
		btn5_5on.src = "./images/btn5_5b.gif";
		btn5_6on = new Image(15, 142);
		btn5_6on.src = "./images/btn5_6b.gif";
		btn5_7on = new Image(15, 142);
		btn5_7on.src = "./images/btn5_7b.gif";
		btn5_8on = new Image(15, 142);
		btn5_8on.src = "./images/btn5_8b.gif";

		btn5_1off = new Image(15, 142);
		btn5_1off.src = "./images/btn5_1a.gif";
		btn5_2off = new Image(15, 142);
		btn5_2off.src = "./images/btn5_2a.gif";
		btn5_3off = new Image(15, 142);
		btn5_3off.src = "./images/btn5_3a.gif";
		btn5_4off = new Image(15, 142);
		btn5_4off.src = "./images/btn5_4a.gif";
		btn5_5off = new Image(15, 142);
		btn5_5off.src = "./images/btn5_5a.gif";
		btn5_6off = new Image(15, 142);
		btn5_6off.src = "./images/btn5_6a.gif";
		btn5_7off = new Image(15, 142);
		btn5_7off.src = "./images/btn5_7a.gif";
		btn5_8off = new Image(15, 142);
		btn5_8off.src = "./images/btn5_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;
		}
	}