function show(object) {
	if (document.getElementById && document.getElementById(object) != null)
		node = document.getElementById(object).style.visibility='visible';
	else if (document.layers && document.layers[object] != null)
		document.layers[object].visibility = 'visible';
}

function hide(object) {
	if (document.getElementById && document.getElementById(object) != null)
		node = document.getElementById(object).style.visibility='hidden';
	else if (document.layers && document.layers[object] != null)
		document.layers[object].visibility = 'hidden';
}