function thirdLevelShowHide(id) {
	
	if (document.getElementById('thirdLevel-1')) document.getElementById('thirdLevel-1').style.display = "none";	
	if (document.getElementById('thirdLevel-2')) document.getElementById('thirdLevel-2').style.display = "none";
	if (document.getElementById('thirdLevel-3')) document.getElementById('thirdLevel-3').style.display = "none";	
	if (document.getElementById('thirdLevel-'+id)) document.getElementById('thirdLevel-' + id).style.display = "inline";
	
	if (document.getElementById('thirdLink-1')) document.getElementById('thirdLink-1').className = "thirdnav";
	if (document.getElementById('thirdLink-2')) document.getElementById('thirdLink-2').className = "thirdnav";
	if (document.getElementById('thirdLink-3')) document.getElementById('thirdLink-3').className = "thirdnav";
	if (document.getElementById('thirdLink-'+id)) document.getElementById('thirdLink-' + id).className = "thirdnav-selected";
}