var oldDisplay=[];

function hideobject(object_name) {
	if (document.getElementById(object_name)) {
		oldDisplay[object_name]=document.getElementById(object_name).style.display;
		document.getElementById(object_name).style.display='none';
	}
}

function showobject(object_name) {
	if (document.getElementById(object_name)) {
		if (!oldDisplay[object_name])
			oldDisplay[object_name]='inline';
		document.getElementById(object_name).style.display=oldDisplay[object_name];
	}
}