var Navigation = new Object();

Navigation.init = function(subItems)
{
	Navigation.subNav = subItems;
}

Navigation.display = function(subItem, activeItem)
{
	for(var i=0; i<Navigation.subNav.length; i++)
	{
		var subItems = document.getElementById(Navigation.subNav[i]);
		if(subItems == document.getElementById(subItem))
		{
			subItems.style.display = '';
		}
		else
		{
			subItems.style.display = 'none';
		}
	}
}

Navigation.collapse = function(subItem)
{
	if(Navigation._interval)
	{
		clearInterval(Navigation._interval);
	}
	Navigation._interval = setInterval('Navigation.Close("'+ subItem +'");', 4000);
}

Navigation.Close = function(subItem)
{
	document.getElementById(subItem).style.display = 'none';
	clearInterval(Navigation._interval);
}