$('#mySubmitForm').submit( function() {
  var form = $(this);
  $.post(
    form.attr('action'),
    form.serialize(),
    success: function( response ) {
      // do shizzle when submit succeeds...
      form.addClass('success');
    },
    failure: function( respones ) {
      // do shizzle when submit fails...
      form.addClass('error');
    }
  );
  return false;
});