function viewNavi(objectId) 
{
	if (document.getElementById)
	{
		document.getElementById('link1').style.display = "none";
		document.getElementById('link2').style.display = "none";
		document.getElementById('link3').style.display = "none";
		document.getElementById('link4').style.display = "none";
		document.getElementById(objectId).style.display = "block";
	}
}