function show(id1,id2)
{
	el = document.getElementById(id1);
	if (el.style.display=='none') {
		el.style.display = 'block';
		x = document.getElementById(id2);
		x.style.display = 'none';
	} else {
		el.style.display = 'none';
		x = document.getElementById(id2);
		x.style.display = 'block';
	}
}