bName = navigator.appName; 
	bVer = parseInt(navigator.appVersion);
	if ((bName == "Netscape" && bVer >= 3) ||
		(bName == "Microsoft Internet Explorer" && bVer >=4)) br = "n3";
		else br = "n2";

	if (br== "n3") {

		introductionon = new Image();
		introductionon.src = "icon_introduction_on.gif";
		introductionoff = new Image();
		introductionoff.src = "icon_introduction.gif";
		companyon = new Image();
		companyon.src = "icon_company_profile_on.gif";
		companyoff = new Image();
		companyoff.src = "icon_company_profile.gif";
		humanon = new Image();
		humanon.src = "icon_human_resource_on.gif";
		humanoff = new Image();
		humanoff.src = "icon_human_resource.gif";
		productionon = new Image();
		productionon.src = "icon_production_on.gif";
		productionoff = new Image();
		productionoff.src = "icon_production.gif";
		factoryon = new Image();
		factoryon.src = "icon_factory_on.gif";
		factoryoff = new Image();
		factoryoff.src = "icon_factory.gif";
		productson = new Image();
		productson.src = "icon_products_on.gif";
		productsoff = new Image();
		productsoff.src = "icon_products.gif";
		environmenton = new Image();
		environmenton.src = "icon_environment_on.gif";
		environmentoff = new Image();
		environmentoff.src = "icon_environment.gif";
		awardson = new Image();
		awardson.src = "icon_awards_on.gif";
		awardsoff = new Image();
		awardsoff.src = "icon_awards.gif";
		contacton = new Image();
		contacton.src = "icon_contact_us_on.gif";
		contactoff = new Image();
		contactoff.src = "icon_contact_us.gif";
	}

	function imgAct(imgName) {
		if (br == "n3") {
			document[imgName].src = eval(imgName + "on.src");
		}
	}

	function imgInact(imgName) {
		if (br == "n3") {
			document[imgName].src = eval(imgName + "off.src");
		}
	}