value of params[X] during this "show chooser" request will be in
$(btn).data('action-data-from-params')[X].
-=end %>
+=end
+%>
+
$('body > .modal-container').html("<%= escape_javascript(render partial: 'choose.html', locals: {multiple: multiple}) %>");
$('body > .modal-container .modal').modal('show');
$('body > .modal-container .modal .modal-footer .btn-primary').