提交表单而不刷新页面ajax，php，javascript？

解决了它只是替换了：

$('#msg_form').submit(function (e) {    e.preventDefault();$.ajax({  type: 'post',url: 'mailer.php',data: $('#msg_form').serialize(),success: function () { alert('form was submitted');}    });    return false;});

用这个代替

$.post('mailer.php', $('#msg_form').serialize())