Stuff

<?php
	if (isset($_COOKIE["user"]))
		echo "";
	else
 		setcookie("user", "Guest", time()+3600);
?>



then later in the HTML

<?php				
	if ($_COOKIE["user"]="Guest")
	{
		echo "<font size=\"-1\"><a href=\"login.php\">login</a> <a href=\"register.php\">register</a></font>";
	}
	else
	{
		echo "Welcome " . $_COOKIE["user"];
	}
?>