Adding select with classes for table-configuration

Hi everybody,
I've edited my CKEditor-Profil and added this JavaScript-Code:

CKEDITOR.stylesSet.add( 'default',
[
    // Table styles
    { name : 'Borderless', element : 'table', attributes : { 'class' : 'borderless' } }
]);

But nothing happen? Have cleaned Cache and run Cron.