function showNav (theid) {
  if (document.getElementById) {
	// Hide both subnavs
	document.getElementById('nav-create').style.display = 'none';
	document.getElementById('nav-manage').style.display = 'none';
	// Display the requested nav
	var show_id = document.getElementById(theid);
	show_id.style.display = 'block';
  }
}