function initMenu()
{
	document.getElementById('image_about_id').src = image_dir + "/m_about.gif";
	document.getElementById('image_routes_id').src = image_dir + "/m_routes.gif";
	document.getElementById('image_hire_id').src = image_dir + "/m_hire.gif";
	document.getElementById('image_transport_id').src = image_dir + "/m_transport.gif";
	document.getElementById('image_hotels_id').src = image_dir + "/m_hotels.gif";
	if(false == isEmpty(selected_menu))
	{
		document.getElementById('image_' + selected_menu + '_id').src = image_dir + "/m_" + selected_menu + "_sel.gif";
	}

	document.getElementById('aboutDropMenu').style.display = 'none';
	document.getElementById('routesDropMenu').style.display = 'none';
	document.getElementById('hireDropMenu').style.display = 'none';
	document.getElementById('transportDropMenu').style.display = 'none';
	document.getElementById('hotelsDropMenu').style.display = 'none';
}
function closeAll()
{
	initMenu();
}
function showMenu(drop_menu)
{
	if(false == isEmpty(drop_menu))
	{
		document.getElementById('image_' + drop_menu + '_id').src = image_dir + "/m_" + drop_menu + "_drop.gif";
		document.getElementById(drop_menu + 'DropMenu').style.display = '';
	}
	
}