function openSub(id)
{
	var itm = document.getElementById("item"+id);
	var itm_sub = document.getElementById("sub"+id);
	if(itm_sub.style.display == 'none')
	{
		itm_sub.style.display = 'block';
		itm.className = 'selected';
	}
	else
	{
		itm_sub.style.display = 'none';
		itm.className = '';
	}	
}