$(document).on('click', '#selected-action button[class=delete]', function(event) {
    event.preventDefault();

    var enc_track_ids_with_position = $('div.checkbox.checked').map(function() {
            var enc_track_id = this.getAttribute('enc_track_id');
            var position = this.getAttribute('position');
            return position + ':' + enc_track_id;
        }).get(),
        enc_track_ids_with_position_string = enc_track_ids_with_position.join(','),

        message = trans('Track has been removed from playlist') + '<br/>',
        data = {'enc_track_ids': enc_track_ids, 'action': action, 'enc_pur_id': enc_pur_id};

    okAjax(
        {
            url: tracks_operations_url,
            type: "POST",
            dataType: "json",
            data: data
        },
        function() {
            $.pjax.reload('#pjax-container');
            showInfo(
                message +
                '<button onclick="handleAddTracks(this);" class="add" action="add_tracks_to_playlist" enc_track_ids_with_position="' +
                enc_track_ids_with_position_string + '" enc_pur_id="' + enc_pur_id + '">' + trans('undo') + '</button>'
            );
        }
    );
});