function SaveComments() {
    // ID of the button, not a <input type="submit" />
    // on page load...
    // $('#id_of_button_button_save_comments').click(function() { SaveComments(); });
    
    alert('Saving comments...');
    var commoptions = { 
        success: function(responseText) 
        {
          alert('Comment saved. Returned: '+responseText);
          // Inject the response somewhere
          // $('#id_of_response_div').html(responseText);
        }
  }; 
    $('#id_of_form_you_are_submitting').ajaxSubmit(commoptions);
}