var menuSections = new Array('Who','What','How','Now');

function outMenu(section) {
	document.getElementById('menu' + section).style.visibility='visible';
	document.getElementById('subMenu' + section).style.display='none';
}

function overMenu(section) {
	for (var i = 0; i < menuSections.length; i++)
		if (menuSections[i] != section)
			outMenu(menuSections[i]);
			
	document.getElementById('menu' + section).style.visibility='hidden';
	document.getElementById('subMenu' + section).style.display='block';
}

function outSubMenu(elm,name) {
	elm.src = '/img/en/menu/submenu.' + name + '.gif';
}

function overSubMenu(elm,name) {
	elm.src = '/img/en/menu/submenu.over.' +  name + '.gif';
}