async function load_idb_tables() {
    console.log('****************** Load IDB Tables ******************');
    console.log('Loading IDB tables...');

    localforage.config({
        driver: localforage.INDEXEDDB,
        version: 1,
        name: idb_name
    });

    tbl_event = await localforage.createInstance({
        name: idb_name,
        storeName: 'event',
    });
    console.log('tbl_event count: '+ await tbl_event.length());
    tbl_event_key_count = await tbl_event.length();

    tbl_event_location = await localforage.createInstance({
        name: idb_name,
        storeName: 'event_location',
    });
    console.log('tbl_event_location count: '+ await tbl_event_location.length());
    tbl_event_location_key_count = await tbl_event_location.length();

    tbl_event_session = await localforage.createInstance({
        name: idb_name,
        storeName: 'event_session',
    });
    console.log('tbl_event_session count: '+ await tbl_event_session.length());
    tbl_event_session_key_count = await tbl_event_session.length();

    tbl_event_presentation = await localforage.createInstance({
        name: idb_name,
        storeName: 'event_presentation',
    });
    console.log('tbl_event_presentation count: '+ await tbl_event_presentation.length());
    tbl_event_presentation_key_count = await tbl_event_presentation.length();

    tbl_event_presenter = await localforage.createInstance({
        name: idb_name,
        storeName: 'event_presenter',
    });
    console.log('tbl_event_presenter count: '+ await tbl_event_presenter.length());
    tbl_event_presenter_key_count = await tbl_event_presenter.length();


    tbl_event_file = await localforage.createInstance({
        name: idb_name,
        storeName: 'event_file',
    });
    console.log('tbl_event_file count: '+ await tbl_event_file.length());
    tbl_event_file_key_count = await tbl_event_file.length();

    console.log('IDB tables have now been opened.');

    return true;
}