fadeIn pdf documents based on select option

JS fadeIn select options

//http://documents.cellsearchctc.com/

//language
  $('.all, .pt').hide();
  $('#selectForm').change(function(event) {
    $('.all,  .language-list h1').hide();
    toggleLanguage(this.value);
  });

//country
  $('#selectForm2').change(function(event) {
    $('.all,  .language-list h1').hide();
    if ($('.prompt.' + this.value).length > 0) {
      $('.prompt.' + this.value).fadeIn('slow');
      $('#selectForm').attr('disabled', 'disabled');
    }
    else {
      $('.language-list h1').show();
      $('.pt').hide();
      $('#selectForm').removeAttr('disabled');
      toggleLanguage($('#selectForm').val());
    }
  });

  $('.it').change(function(event) {
    $('.all,  .language-list h1').hide();
    $('.prompt').fadeIn('slow');
  });

  $('.prompt .accept').click(function() {
    toggleLanguage($('#selectForm').val());
    $('#selectForm').removeAttr('disabled');
  });
  $('.prompt .reject').click(function() {
    $('.prompt-one').hide();
    $('.reject-message', $(this).parents('.prompt')).fadeIn('slow');
  });


});


function toggleLanguage(language) {
  if(language == 'all') return;
  $('.' + language).fadeIn('slow');
  $('.prompt').hide();
  $('.prompt-one').show();
  $('.reject-message').hide();


  $('.language-list h1').each(function() {
    if ($(this).next('ul').find('li:visible').length === 0) {
      $(this).hide();
    } else {
      $(this).show();
    }
  });
}