/* function to expand/collapse a div */
function tierObject(objectid) {
	obj = document.getElementById(objectid);
	if (obj)
		switchObject(obj);
}

function switchObject(obj) {
	if(obj.style.display == 'none') {
		obj.style.display = 'block';		
		return 'block';
	} else {
		obj.style.display = 'none';
		return 'none';
	}
}

function showObject(objectid) {
	obj = document.getElementById(objectid);
	if(obj.style.display == 'none') {
		obj.style.display = 'block';		
		return 'block';
	} 
}

function hideObject(objectid) {
	obj = document.getElementById(objectid);
	if(obj.style.display == 'block') {
		obj.style.display = 'none';		
		return 'none';
	}
}