var containerElement = null;
var visibleId = null;

function swapVisibility(id) {
	if (visibleId != null && visibleId != id) {
		containerElement.style.display = 'none';
		containerElement.style.visibility = 'hidden';
		containerElement = null;
	}
	containerElement = document.getElementById(id);
	if (containerElement.style.display == 'none') {
		containerElement.style.display = 'block';
		containerElement.style.visibility = 'visible';
		visibleId = id;
	} else {
		containerElement.style.display = 'none';
		containerElement.style.visibility = 'hidden';
		containerElement = null;
		visibleId = null;
	}
	return false;
}