function show_hidden_table (target, time)
	{
	for (i=1; i<time; i++)
		{
		loc = document.getElementById ("table" + i);
		if (i == target)
			{
			loc.style.display = 'block';
			}
		else
			{
			loc.style.display = 'none';
			}
		}
	}

function tree_handler (target)
	{
	icon_minus = new Image;
	icon_minus.src = "kepek/icon_minus.gif";
	icon_plus = new Image;
	icon_plus.src = "kepek/icon_plus.gif";

	table = document.getElementById ("menutable" + target);
	icon = document.getElementById ("menu" + target);
	if (table.style.display == 'block')
		{
		table.style.display = 'none';
		icon.src = icon_plus.src;
		}
	else
		{
		table.style.display = 'block';
		icon.src = icon_minus.src;
		}
	}