/**
 * Playlist
 * 
 * Manage registered user playlists
 */
 
 var playlistUrl = 'playlist.php';

/**
 * Get cross-browser XMLHTTPRequest
 */
function objAjax() {
    var xmlhttp=false;
    try {
        xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
    } catch (e) {
        try {
           xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
        } catch (E) {
            xmlhttp = false;
        }
    }

    if (!xmlhttp && typeof XMLHttpRequest!='undefined') {
        xmlhttp = new XMLHttpRequest();
    }

    return xmlhttp;
}

/**
 * Add video to playlist
 */
function addToPlaylist(videoId) {
    var requestObj = objAjax();
    requestObj.open("GET", playlistUrl + '?vid=' + videoId, true);
    requestObj.onreadystatechange = function() {
        if (requestObj.readyState == 4) {
            if (requestObj.responseText == 1)
                // this pattern @xxx@ is handled by translateJs.php, where the therm inside is translated
                alert('Video Added to Playlist');
            else
                if (confirm('You need to be signed in to add videos to your playlist. Do you want to sign up?'))
                    location = 'login.php';
        }
    }
    requestObj.send(null);
}