function showSub(odiv)
{
	el = odiv.nextSibling;
	while(el)
	{
		// autre niveau 1
		if(el.className == 'menuelem-level-1')
		{
			closeAll();
			break;
		}
		
		// premier niveau 2
		if(el.className == 'menu-level-2')
		{
			el.style.visibility = 'visible';
			break;
		}
		el = el.nextSibling;
	}
}

function closeAll()
{
	var allDivs = document.getElementsByTagName('DIV');
	for(i=0;i<allDivs.length;i++)
	{
		if(allDivs[i].className == 'menu-level-2')
		{
			allDivs[i].style.visibility = 'hidden';
		}
	}
}