function switchMenu(obj)
{
var el = document.getElementById(obj);
	if(el.style.display != "block")
	{
	el.style.display = "block";
	}
	else
	{
	el.style.display = "none";
	}
}

function expand(obj)
{
	if(obj.value != "+")
	{
	obj.value = "+";
	}
	else
	{
	obj.value = "-";
	}
}

// expand all