function switchPrivUnter(activeId,inactiveId, visibleID, invisibleID){
	var aobj = document.getElementById(activeId);
	var iobj = document.getElementById(inactiveId);
	var vobj = document.getElementById(visibleID);
	var ivobj = document.getElementById(invisibleID);
	
	if(aobj.className != "active"){
		aobj.className = "active";
		iobj.className = "";
		
		vobj.style.display = "block";
		ivobj.style.display = "none";
		
	}else{
		// do nothing
	}
}