var majors = new Array('about', 'services', 'clients', 'newsletters', 'tips', 'links', 'sitemap');
function toggle(a, b) {
	if (!document.getElementById) return true;
	if (b==1) for (var i=majors.length-1; i>=0; i--) if (majors[i] != a) document.getElementById(majors[i]).style.display='none';
	a=document.getElementById(a);
	a.style.display=(a.style.display=='block')?'none':'block';
	return false;
}

<!-- hides sub level navigation if javascript is enabled -->
function hideMenu() {
	var navMenu = document.getElementById('nav');
	var navUL = navMenu.getElementsByTagName('ul');
	
	for (var i=navUL.length-1; i>=0; i--) {
		navUL[i].style.display='none';
	}
}