var pws_obj = null;
var pws_id = 0;
var pws_group = "";
var pws_interval = null;
var pws_list;
var pws_current = -1;
var pws_moving = 0;

function StartPreview(obj, id, group) {

    //obj.children[0].src = "/content/image/default.aspx?file=17532&tipo=1";

    if (pws_interval != null)
        clearInterval(pws_interval);

    pws_obj = obj;
    pws_id = id;
    pws_group = group;
    pws_current = -1;
    pws_moving = 1;
    try {
        VideoPreview.GetVideoPreview(id, OnCallBackComplete);
    }
    catch (e) {
    }

}
function StopPreview() {
    if (pws_interval != null)
        clearInterval(pws_interval);
    pws_interval = null;
    pws_obj = null;
    pws_id = 0;
    pws_group = "";
    pws_moving = 0;
}
function OnCallBackComplete(result) {

    if (pws_interval != null)
        clearInterval(pws_interval);

    if (pws_moving == 1) {
        pws_list = result.split(",");
        pws_interval = setInterval("MovingPreview()", 500);
    }
}
function MovingPreview() {

    if (pws_moving == 1) {

        pws_current += 1
        if (pws_current >= pws_list.length)
            pws_current = 0;
        pws_obj.children[0].src = "/content/image/default.aspx?file=" + pws_id + "&tipo=1&idPrev=" + pws_list[pws_current];
    }
}