function change(_event)
{
	/*
	var target=_event.target;
	if (!target)
		target=_event.srcElement;
*/
	var target=_event;
	target=target.parentNode.parentNode;

	if (target.className=="open")
		target.className="closed";
	else if (target.className=="closed" || target.className=="closed hl")
		target.className="open";
}
function over_hl(target)
{
	if (target.className=="closed")
		target.className="closed hl";
}
function out_hl(target)
{
	if (target.className=="closed hl")
		target.className="closed";
}