// JavaScript Document

function menu(objId, action){
				
	var subnavi = document.getElementById(objId);
	
	if(action == "hide") {
		subnavi.style.visibility = "hidden";
		subnavi.parentNode.className = "";
	} 
	if(action == "show"){
		subnavi.style.visibility = "visible";
		subnavi.parentNode.className = "active";
	} 
	if(action != "show" && action != "hide") {
		alert("wrong parameter!");
		return false;
	}
	
}

function changeClass(obj, cName, action){

	if(action == "highlight"){
		obj.className = cName+"-hl";
	}
	if(action == "back"){
		obj.className = cName;
	}
}