update archive

app/assets/javascripts/archive_form.js.erb

@@ -0,0 +1,9 @@
+$('.archive_file_multiples_block a.delete').live('click', function(){
+  $(this).parents('.list_item').remove();
+});
+
+$(document).on('click', '.action a.remove_existing_record', function(){
+  $(this).next('.should_destroy').attr('value', 1);
+  $("tr#archive_file_multiple_" + $(this).prev().attr('value')).hide();
+});
+