// JavaScript Document
function displayblock(id){
	obj = document.getElementById(id);
	obj.style.display = 'block';
	obj.style.visibility = 'visible';
}
function hideblock(id){
	obj = document.getElementById(id);
	obj.style.display = 'none';
	obj.style.visibility = 'hidden';
}
function displayorhideblock(id){
	obj = document.getElementById(id);
	if (obj.style.display != 'block') {
		obj.style.display = 'block';
		obj.style.visibility = 'visible';
	}
	else {	
		obj.style.display = 'none';
		obj.style.visibility = 'hidden';
	}
}