// JavaScript CSS Show/Hide script
function showlayer(layerid){
  obj = document.getElementById(layerid);
	if (obj.style.display == 'none')
	  obj.style.display = 'block';
	else
	  obj.style.display = 'none';
}
function hidelayer(layerid){
  obj = document.getElementById(layerid);
	if (obj.style.display == 'block')
	  obj.style.display = 'none';
	else
	  obj.style.display = 'none';
}