function trackAdClick(onlineAdId, TargetURL, IsExternal) {
    $.ajax({
        type: "POST",
        contentType: "application/json; charset=utf-8",
        url: "/Services/OnlineAds.asmx/TrackAdClick",
        data: "{'onlineAdId':'" + onlineAdId + "'}",
        dataType: "json",
        async: true,
        success: function(msg) {
            if (IsExternal == "true") {
                window.open(TargetURL, '_blank', null);
            }
            else {
                //window.open(TargetURL, '_self', null);
                location.href = TargetURL;
            }
        }
    });
}