function login() {
   var url = '/summit/login.php';
   var params = getParams('loginForm');

   var myAjax = new Ajax.Request(url, { method:'post',
                                        parameters:params,
                                        onComplete:function(req) {
                                           $('login').innerHTML = req.responseText;
                                           location.reload(true);
                                        }
                                      }
                                );
   return;
}

function logout() {
   var url = '/summit/logout.php';
   var params = '';

   var myAjax = new Ajax.Request(url, { method:'post',
                                        parameters:params,
                                        onComplete:function(req) {
                                           $('login').innerHTML = req.responseText;
                                           location.reload(true);
                                        }
                                      }
                                );
   return;
}