function mostrar_submenu(o)
{
    o.parentNode.getElementsByTagName("DIV")[0].style.display = 'block'
}

function ocultar_submenu(o,evt)
{
	if (o.nodeName == 'A')
	{
		o = o.parentNode.getElementsByTagName("DIV")[0]
	}
	var e = window.event || evt
	if (e.relatedTarget)
	{
		toElt = e.relatedTarget.nodeName
	} else {
		toElt = e.toElement.nodeName
	}
	if (toElt == 'A')
	{
		return
	}
	o.style.display = 'none'
}