function popupvid(sw) {
    if (sw == 1) {
        // Show popup
        document.getElementById('blackoutvid').style.visibility = 'visible';
        document.getElementById('divpopupvid').style.visibility = 'visible';
        document.getElementById('blackoutvid').style.display = 'block';
        document.getElementById('divpopupvid').style.display = 'block';
    } else {
        // Hide popup
        document.getElementById('blackoutvid').style.visibility = 'hidden';
        document.getElementById('divpopupvid').style.visibility = 'hidden';
        document.getElementById('blackoutvid').style.display = 'none';
        document.getElementById('divpopupvid').style.display = 'none';
    }
}