var hm_act = null;
var hm_timer = null;

function hm_show(o)
{
	hm_stop_hiding();
	if (hm_act != null && hm_act.id != o.id) hm_hide(hm_act);
	if (o.className != 'submenu-open')
	{
		o.className = 'submenu-open';
		o.style.zIndex = 2;
		hm_act = o;
	}
}

function hm_start_hiding()
{
	hm_timer = setTimeout('hm_hide()', 400);
}

function hm_stop_hiding()
{
	clearTimeout(hm_timer);
	hm_timer = null;
}

function hm_hide()
{
	if (hm_act != null)
	{
		hm_act.className = 'submenu';
		hm_act.style.zIndex = 1;
		hm_act = null;
	}
}