function combo1(mid) {
	if (isNS4){
		AsubHome = document.layers["subHome"];
		AsubGlo = document.layers["subGlo"];
		AsubBus = document.layers["subBus"];
		AsubTour = document.layers["subTour"];
		AsubGov = document.layers["subGov"];
		AsubLang = document.layers["subLang"];
		AsubStu = document.layers["subStu"];
		Ahome = document.layers["home"];
		Aglo = document.layers["glo"];
		Abus = document.layers["bus"];
		Atour = document.layers["tour"];
		Agov = document.layers["gov"];
		Alang = document.layers["lang"];
		Astu = document.layers["stu"];
	}
	else if (isIE4) {
		AsubHome = document.all["subHome"];
		AsubGlo = document.all["subGlo"];
		AsubBus = document.all["subBus"];
		AsubTour = document.all["subTour"];
		AsubGov = document.all["subGov"];
		AsubLang = document.all["subLang"];
		AsubStu = document.all["subStu"];
		Ahome = document.all["home"];
		Aglo = document.all["glo"];
		Abus = document.all["bus"];
		Atour = document.all["tour"];
		Agov = document.all["gov"];
		Alang = document.all["lang"];
		Astu = document.all["stu"];
	}
	else if (isIE5 || isNS6) {
		AsubHome = document.getElementById("subHome");
		AsubGlo = document.getElementById("subGlo");
		AsubBus = document.getElementById("subBus");
		AsubTour = document.getElementById("subTour");
		AsubGov = document.getElementById("subGov");
		AsubLang = document.getElementById("subLang");
		AsubStu = document.getElementById("subStu");
		Ahome = document.getElementById("home");
		Aglo = document.getElementById("glo");
		Abus = document.getElementById("bus");
		Atour = document.getElementById("tour");
		Agov = document.getElementById("gov");
		Alang = document.getElementById("lang");
		Astu = document.getElementById("stu");
	}
	AsubHome.style.visibility="hidden";
	AsubGlo.style.visibility="hidden";
	AsubBus.style.visibility="hidden";
	AsubTour.style.visibility="hidden";
	AsubGov.style.visibility="hidden";
	AsubLang.style.visibility="hidden";
	AsubStu.style.visibility="hidden";
	Ahome.bgColor=theBgColor;
	Aglo.bgColor=theBgColor;
	Abus.bgColor=theBgColor;
	Atour.bgColor=theBgColor;
	Agov.bgColor=theBgColor;
	Alang.bgColor=theBgColor;
	Astu.bgColor=theBgColor;
		
	switch(mid.id){
		case "home":
			AsubHome.style.visibility="visible";
			Ahome.bgColor=theFgColor;
		break;
	
		case "glo":
			AsubGlo.style.visibility="visible";
			Aglo.bgColor=theFgColor;
		break;
		
		case "bus":
			AsubBus.style.visibility="visible";
			Abus.bgColor=theFgColor;
		break;
	
		case "tour":
			AsubTour.style.visibility="visible";
			Atour.bgColor=theFgColor;
		break;
	
		case "gov":
			AsubGov.style.visibility="visible";
			Agov.bgColor=theFgColor;
		break;
		case "lang":
			AsubLang.style.visibility="visible";
			Alang.bgColor=theFgColor;
		break;
		case "stu":
			AsubStu.style.visibility="visible";
			Astu.bgColor=theFgColor;
		break;
	}

}