function hideMenu(menuID)
{
	var menuContainer = document.getElementById(menuID);
	menuContainer.style.display = 'none';
}
function changeVisibilityMenu(menuID)
{
	var menuContainer = document.getElementById(menuID);
	if (menuContainer.style.display == 'block')
	{
		menuContainer.style.display = 'none';
	}
	else
	{
		menuContainer.style.display = 'block';
	}
}
function showMenu(menuID)
{
	var menuContainer = document.getElementById(menuID);
	menuContainer.style.display = 'none';
}
function hideContent(contentID)
{
	var contentContainer = document.getElementById(contentID);
	contentContainer.style.display = 'none';
}
function changeVisibility(contentID)
{
	var contentContainer = document.getElementById(contentID);
	if (contentContainer.style.display == 'block')
	{
		contentContainer.style.display = 'none';
	}
	else
	{
		contentContainer.style.display = 'block';
	}
}