var isPlayingIdx = -1;

function voteUP(parent, dataString, ind) {
    $.ajax({
        type: "POST",
        url: VOTE_URL + "up_vote.php",
        data: dataString,
        cache: false,

        success: function (data) {
            re = jQuery.parseJSON(data);

            parent.html(re.message);
            parent.addClass('voted');

            $('#vote' + ind + "_sym").attr('src', re.symb);
        }
    });
}

function votePlus(parent, dataString, ind) {
    $.ajax({
        type: "POST",
        url: VOTE_URL + "up_voteplus.php",
        data: dataString,
        cache: false,

        success: function (data) {
            re = jQuery.parseJSON(data);

            parent.html(re.message);
            parent.addClass('voted');

            $('#voteplus' + ind + "_sym").attr('src', re.symb);
        }
    });
}

function prevPlay(path, i, type) {
    if (path != 'NULL') {
        if (i + type != isPlayingIdx) {
            $('.prev_player').html("");

            $(".player_container_" + type + i).html(
                "<iframe\n" +
                "width='100%'\n" +
                "height='315'\n" +
                "src=PATH\n".replace('PATH', path) +
                "frameBorder='0'\n" +
                "allow='accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture'\n" +
                "allowFullScreen\n" +
                "/>");

            isPlayingIdx = i + type;
        }
    } else {
        alert("Această melodie nu are o previzualizare!");
    }
}<b>x<br><br>Windows NT KPTV 6.2 build 9200 (Windows Server 2012 Datacenter Edition) i586<br></b>