// JavaScript Document
function toggle(id)
{
	var tr = document.getElementById(id);
	if (tr==null) { return; }
	var bExpand = tr.style.display == '';
	tr.style.display = (bExpand ? 'none' : '');
	var img = document.getElementById('img'+id);
	if (img!=null)
	{
		if (!bExpand)
			img.src = 'Graphics/minus.gif';
		else
			img.src = 'Graphics/plus.gif';
	}
}