function showhide(id)
{
	var section = document.getElementById(id);
	section.style.display = (section.style.display != 'block') ? 'block' : 'none';
}

function showhideset(a, linkid)
{
	var numhidden = 0;
	var newdisplay = 'none';
	for (var i = 0; i < a.length; i++)
	{
		if (document.getElementById(a[i]).style.display != 'block')
			numhidden++;
	}
	if (numhidden >= (a.length/2))
		newdisplay = 'block';
	for (var i = 0; i < a.length; i++)
	{
		var element = document.getElementById(a[i]);
		if (element.style.display != newdisplay)
			element.style.display = newdisplay;
	}
}