text: $('.prepaid-pack, .postpaid-pack, .data-pack, .vas-pack, .flexible-pack').hide();
  
  $('.button').click(function() {
    $('.button').removeClass('sub-active');
    const buttonCurrent = $(this).attr('id');
    $('#' + buttonCurrent).addClass('sub-active');
    showPack(buttonCurrent);
  });
  
  function showPack(className) {
    $('.hot-pack, .prepaid-pack, .postpaid-pack, .data-pack, .vas-pack, .flexible-pack').hide();
    $('.' + className).show();
  }
  