var fDesc=new Array();
fDesc[0] = "Kerberos is a network authentication protocol. It is designed to provide strong authentication for client/server applications by using secret-key cryptography. The Kerberos protocol uses strong cryptography so that a client can prove its identity to a server (and vice versa) across an insecure network connection.";

function tShowHide(id, show)
{
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	{
		s.innerHTML = fDesc[id];
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	else
	{
		s.innerHTML = '';
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}