function expand(oAnchor) {
	var aNav = oAnchor.parentNode.parentNode.childNodes;
	
	for (i=0; i<aNav.length; ++i) {
		if (aNav[i].tagName == 'UL') {
			aNav[i].style.display = 'none';
		}
	}

	oAnchor.parentNode.nextSibling.style.display = '';
}