function OpenVideoPopup(VideoId) {

    var w = 600; var h = 640;
    var winl = (screen.width - w) / 2;
    var wint = (screen.height - h) / 2;
    if (winl < 0) winl = 0;
    if (wint < 0) wint = 0;
 

    window.open('video_popup_window.aspx?Id=' + VideoId, null, 'height=' + h + ',width=' + w + ',top=' + wint + ',left=' + winl + ',status=no,toolbar=no,menubar=no,location=no,resizable=no,scrollbars=1');

}

function DownloadFile(fileName) {

    blankRE = /^[\s]+$/;

    if (fileName == "" || blankRE.test(fileName)) {
        alert('File not exist.');
    }
    else {

        window.open('uploads/' + fileName);

    }

}