如何在bootstrap验证器上编写提交处理程序？

Question

我试图在Bootstrap Validator验证表单后使用AJAX提交表单。它由于某种原因不起作用。我怎样才能让它发挥作用？如何在提交表单之前进行确认框？

$('#accountUpdateForm form').bootstrapValidator({
  femphasized texteedbackIcons: {
      valid: 'glyphicon glyphicon-ok',
      invalid: 'glyphicon glyphicon-remove',
      validating: 'glyphicon glyphicon-refresh'
    },
    fields: {

      'firstName': {
        validators: {
          notEmpty: {},
        }
      },
      'lastName': {
        validators: {
          notEmpty: {},
        }
      },

    },
    submitHandler: function(form) {  
      alert("Submit Handler");
      var frm = $('#accountUpdateForm');
      frm.submit(function(ev) {
        $.ajax({
          type: 'POST',
          url: frm.attr('action'),
          data: frm.serialize(),
          cache: false,
          success: function(data, textStatus, jqXHR) {
            alert('Changes saved');
          }
        });
        ev.preventDefault();        
      });    
    }    
});