function showMenu(menuNameSelect, menuName)
{
	var menuSelect = document.getElementById(menuNameSelect);
	var menu = document.getElementById(menuName);
	
	if (menuSelect.style.visibility=="hidden" || menu.style.visibility=="" || menu.style.visibility==null)
	{
		menu.style.visibility="hidden";
		menuSelect.style.visibility="visible";
	}
}

function changeMenu(menuNameSelect, menuName)
{
	var menuSelect = document.getElementById(menuNameSelect);
	var menu = document.getElementById(menuName);
	
	if (menuSelect.style.visibility=="hidden" || menu.style.visibility=="" || menu.style.visibility==null)
	{
		menu.style.visibility="hidden";
		menuSelect.style.visibility="visible";
	}
	else
	{
		menuSelect.style.visibility="hidden";
	}
}

function hiddeMenu(menuNameSelect)
{
	var menuSelect = document.getElementById(menuNameSelect);
	
	if (menuSelect.style.visibility=="visible")
	{
		menuSelect.style.visibility="hidden";
	}
}