function displayMenuNode(parent, child)
{
	parent_el = document.getElementById(parent);
	child_el = document.getElementById(child);
	if (child_el.style.display == 'none' || child_el.style.display == '')
	{
			child_el.style.display = 'block';
			parent_el.style.listStyleImage = "url(/images/nav_closed.gif)";
	}
	else
	{
			child_el.style.display = 'none';
			parent_el.style.listStyleImage = "url(/images/nav_open.gif)";
	}
}