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

	if (version == "yes") {

		welcomeon = new Image();
		welcomeon.src = "images/n_welcome_r.gif";
		videotouron = new Image();
		videotouron.src = "images/n_videotour_r.gif";
		availabilitieson = new Image();
		availabilitieson.src = "images/n_availabilities_r.gif";
		pictorialon = new Image();
		pictorialon.src = "images/n_pictorial_r.gif";
		bspecson = new Image();
		bspecson.src = "images/n_bspecs_r.gif";
		ebrochureon = new Image();
		ebrochureon.src = "images/n_ebrochure_r.gif";
		contacton = new Image();
		contacton.src = "images/n_contact_r.gif";
		occupantson = new Image();
		occupantson.src = "images/n_occupants_r.gif";
		firewardenson = new Image();
		firewardenson.src = "images/n_firewardens_r.gif";

		welcomeoff = new Image();
		welcomeoff.src = "images/n_welcome_n.gif";
		videotouroff = new Image();
		videotouroff.src = "images/n_videotour_n.gif";
		availabilitiesoff = new Image();
		availabilitiesoff.src = "images/n_availabilities_n.gif";
		pictorialoff = new Image();
		pictorialoff.src = "images/n_pictorial_n.gif";
		bspecsoff = new Image();
		bspecsoff.src = "images/n_bspecs_n.gif";
		ebrochureoff = new Image();
		ebrochureoff.src = "images/n_ebrochure_n.gif";
		contactoff = new Image();
		contactoff.src = "images/n_contact_n.gif";
		occupantsoff = new Image();
		occupantsoff.src = "images/n_occupants_n.gif";
		firewardensoff = new Image();
		firewardensoff.src = "images/n_firewardens_n.gif";

		itracon = new Image();
		itracon.src = "images/itrac_r.gif";
		itracoff = new Image();
		itracoff.src = "images/itrac_n.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;
		}
	}