function toggle(elmt) {
	var panel = elmt.parentNode.parentNode.getElementsByTagName('*');
	if (panel[2].nodeName == 'ACRONYM' || panel[2].nodeName == 'acronym') {
		panel = panel[3];
	} else {
		panel = panel[2];
	}
	if (panel.style.display == 'none') {
		panel.style.display = 'block';
	} else {
		panel.style.display = 'none';
	}
}