function toggle(elementId) {
	var el = document.getElementById(elementId);
	if (el.style.display == 'block') {
		el.style.display = 'none';
	} else {
		el.style.display = 'block';
	}
}

function show(elementId, displayType) {
	if (!displayType) {
		displayType = 'block';
	}
	var el = document.getElementById(elementId);
	el.style.display = displayType;
}

function hide(elementId) {
	var el = document.getElementById(elementId);
	el.style.display = 'none';
}