show = false;

function showSub(submenu_name)
{
	document.getElementById(submenu_name).style.display = "block";
	show = false;
}

function hideSub(submenu_name)
{
	if (true != show) 
	{
		document.getElementById(submenu_name).style.display = "none";
	}
}

function hideSelf(submenu_name)
{

	document.getElementById(submenu_name).style.display = "none";
}

function showSelf(submenu_name)
{
	show = true;
	document.getElementById(submenu_name).style.display = "block";
}