browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
if ((browserName == "Netscape" && browserVer >= 3) || (browserName == "Microsoft Internet Explorer" && browserVer >= 4)) version = "n3";
else version = "n2";
	if (version == "n3")
	{
		menu1on = new Image(112, 78);
		menu1on.src = "images/navimg/history_on.gif";
		menu1off = new Image(112, 78);
		menu1off.src = "images/navimg/history_off.gif";
		
		menu2on = new Image(112, 78);
		menu2on.src = "images/navimg/location_on.gif";
		menu2off = new Image(112, 78);
		menu2off.src = "images/navimg/location_off.gif";
		
		menu3on = new Image(112, 78);
		menu3on.src = "images/navimg/directions_on.gif";
		menu3off = new Image(112, 78);
		menu3off.src = "images/navimg/directions_off.gif";
		
		menu4on = new Image(112, 78);
		menu4on.src = "images/navimg/menu_on.gif";
		menu4off = new Image(112, 78);
		menu4off.src = "images/navimg/menu_off.gif";
		
		menu5on = new Image(112, 78);
		menu5on.src = "images/navimg/home_on.gif";
		menu5off = new Image(112, 78);
		menu5off.src = "images/navimg/home_off.gif";
		
	}
	function img_act(imgName)
	{
		if (version == "n3")
		{
			imgOn = eval(imgName + "on.src");
			document [imgName].src = imgOn;
		}
	}
	function img_inact(imgName)
	{
		if (version == "n3")
		{
			imgOff = eval(imgName + "off.src");
			document [imgName].src = imgOff;
		}
	}