// JavaScript Document

//initialize some layer visibility settings

function visUnvis(id) {
	obj = document.getElementsByTagName("div");
	if (obj[id].style.visibility == 'visible'){
		obj[id].style.visibility = 'hidden';
	}
	else {
		obj[id].style.visibility = 'visible';
	}
	return true;
}

function undis(id) {
	obj = document.getElementsByTagName("div");
	obj[id].style.display = 'none';
	return true;
}

function disUndis(id) {
	obj = document.getElementsByTagName("div");
	if (obj[id].style.display == 'block'){
		obj[id].style.display = 'none';
	}
	else {
		obj[id].style.display = 'block';
	}
	return true;
}