var activeSubNav = null;
if(document.getElementById('activeSubNavi')){
	activeSubNav = document.getElementById('activeSubNavi');
}

function showSubNavi(el){
	var list = el.getElementsByTagName('ul');
	if(activeSubNav){
		activeSubNav.style.display = 'none';
	}
	if(list.length > 0){
		list[0].style.display = 'block';
		activeSubNav = list[0];
	}
}

function hideSubNavi(el){
	var list = el.getElementsByTagName('ul');
	if(list.length > 0){
		list[0].style.display = 'none';
	}
	if(document.getElementById('activeSubNavi')){
		activeSubNav = document.getElementById('activeSubNavi');
		activeSubNav.style.display = 'block';
	}
}