personal-journal/app/assets/javascripts/personal_journal/journal_paper_file.js.erb

 $(document).ready(function() {
    	$('.main-forms .add-on').tooltip();
      $(document).on('click', '#add_file', function(){
        var new_id = $(this).prev().attr('value');
        var old_id = new RegExp("new_journal_paper_files", "g");
        var on = $('.language-nav li.active').index();
        var le = $(this).parent('.add-btn').prev('.add-target').children('.start-line').length;
        $(this).prev().attr('value', parseInt(new_id) + 1);
        $(this).parent().siblings('.add-target').append(("<%= escape_javascript(add_attribute 'form_file', f, :journal_paper_files) rescue "" %>").replace(old_id, new_id));
        $(this).parent('.add-btn').prev('.add-target').children('.start-line').eq(le).children('.input-append').find('.tab-content').each(function() {
          $(this).children('.tab-pane').eq(on).addClass('in active').siblings().removeClass('in active');
        });
        formTip();
      }); 
      $(document).on('click', '.delete_file', function(){
        $(this).parents('.input-prepend').remove();
      });
      $(document).on('click', '.remove_existing_record', function(){
        if(confirm("<%= I18n.t(:sure?)%>")){
          $(this).children('.should_destroy').attr('value', 1);
          $(this).parents('.start-line').hide();
        }
      });
    });