//	Navigation

function exp_coll(index)
	{
	s = document.getElementById("block_" + index);
	if (s.style.display == 'none') exp(index);
	else if (s.style.display == 'block') coll(index);
	else  coll(index);
	}

function exp(index)
	{
	f = document.getElementById("folder_" + index);
	s = document.getElementById("block_" + index);
	i = document.getElementById("image_" + index);
	if (!(s && i && f)) return false;
	f.className = "folder_active";
	s.style.display = 'block';
	i.src = "http://www.lux-vision.ch/dropbox/navigation/minus.gif";
	}

function coll(index)
	{
	f = document.getElementById("folder_" + index);
	s = document.getElementById("block_" + index);
	i = document.getElementById("image_" + index);
	if (!(s && i && f)) return false;
	f.className = "folder";
	s.style.display = 'none';
	i.src = "http://www.lux-vision.ch/dropbox/navigation/plus.gif";
	}

function select(index)
	{
	f = document.getElementById("folder_" + index);
	if (f) f.className = "folder_active";
	else
		{
		f = document.getElementById("file_" + index);
		if (f) f.className = "file_active";
		}
	}

function coll_all()
	{
	coll(1);
	}

function exp_all()
	{
	exp(1);
	}