function ToggleMenu(itemName) {
	var elm = document.getElementById(itemName);
	var i,others = document.getElementById('SectionMenu');
	for(i=0; i < others.childNodes.length; i++) {
		var other = others.childNodes[i];
		if ((other.className == 'MenuGroup') && (other != elm)) other.style.display='none';
	}
	if (elm.style.display == 'block') elm.style.display='none';
	else elm.style.display='block';
	return false;
}