Toggle between CKEditor 3 and Texteare

function disableCKEditor(textarea) {
    // We cannot use getEditor() since it will throw an exception.
    // http://ckeditor.com/blog/CKEditor_for_jQuery
    var ck = textarea.eq(0).data('ckeditorInstance');
    if (ck) {
        ck.destroy();
        ck = false;
    }
}

       // NOTE: If the django-filebrowser app is not used, then remove the filebrowserBrowseUrl.
        // Using ckeditor() to replace a textarea does not call ckeditor/config.js, so we must
        // specify the config explicitly.
        content_field.ckeditor(function() { }, {width: '100%', 
                                                filebrowserBrowseUrl: '/admin/filebrowser/browse?pop=3'
                                               });