window.addEvent('domready', function(){
                $('myForm').addEvent('submit', function(e) {

                    new Event(e).stop();
                    var log = $('log_res').empty().addClass('ajax-loading');
                    this.send({
                        update: log,
                        onComplete: function() {
                            log.removeClass('ajax-loading');
                        }
                    });
                });        
            });