var t

function StartRotate(sVideoThumb, sURL, iThumb) 
{
    var imgVideoThumb = document.getElementById(sVideoThumb);
    if (imgVideoThumb != null) 
    {
        if (iThumb == 14) {

            imgVideoThumb.src = sURL + pad(iThumb,3) + '.jpg';
            t = setTimeout("StartRotate('" + sVideoThumb + "', '" + sURL + "', '0')", 500);
        }
        else {
            iThumb++;
            imgVideoThumb.src = sURL + pad(iThumb,3) + '.jpg';

            t = setTimeout("StartRotate('" + sVideoThumb + "', '" + sURL + "', '" + iThumb + "')", 500);
        }
    }
}

function pad(n, len) {

    s = n.toString();
    if (s.length < len) {
        s = ('00' + n.toString()).slice(-len);
    }

    return s;

}

function StopRotate(sVideoThumb, sURL) 
{
    clearTimeout(t);

    var imgVideoThumb = document.getElementById(sVideoThumb);
    if (imgVideoThumb != null) {
        imgVideoThumb.src = sURL;
    }
}