function flip(rid)
{
	current = (document.getElementById(rid).style.display == 'none') ?
							'block' : 'none';
	document.getElementById(rid).style.display = current;
}

function unflip(rid)
{
	current = (document.getElementById(rid).style.display == 'block')
							? 'none' : 'block';
	document.getElementById(rid).style.display = current;
}