function triggerBoxOptions(e){
  $(".boxOptions a",e).click(function(){
    if($(this).hasClass('selected')) return false;
    
    $(".boxOptions a",e).unbind('click').click(function(){ return false; }); 
    
    $(".boxOptions a",e).removeClass('selected');
    $(this).addClass('selected');
    $(".caja-ultimos",e).remove();
    
    e.append('<div class="caja-ultimos"><span class="spinner"></span> <b>Cargando comentarios</b></div>');

    var urlJson=$(this).attr('json');
    $.getJSON(urlJson, function(data) {
      $(".caja-ultimos",e).remove();
      e.append(data.caja);
      triggerBoxOptions(e);
    });
    
    return false;
  });
}