function getContextRoot() {
		    re = /(\/[^\/]+)\//;
		    found = window.location.pathname.match(re);
		    return found[1]+'-action';
		}

		function loginStatus() {
		    var root = getContextRoot();
		    new Ajax.Request(root + '/users/is_logged_in',
		    {
		        method:'get',
		        onSuccess: function(transport) {
							var loggedIn = $('loggedIn');
						  if (transport.responseText.match(/true/))
						      loggedIn.update('<a href="'+ root  + '/users/logout">Logout</a>');
		        }
		    });
		}
		Event.observe(window, 'load', function() { loginStatus(); });