function ajaxAdminVoteTopic(idTopic,value) {
    var req = new JsHttpRequest();
    req.onreadystatechange = function() {
        if (req.readyState == 4) {
            if (req.responseJS.bStateError) {
                msgErrorBox.alert(req.responseJS.sMsgTitle,req.responseJS.sMsg);
            } else {
                msgNoticeBox.alert(req.responseJS.sMsgTitle,req.responseJS.sMsg);
                document.getElementById('topic_rating_'+idTopic).innerHTML=req.responseJS.iRating;
                if (req.responseJS.iRating<0) {
                        document.getElementById('topic_rating_'+idTopic).style.color="#d00000";
                } else {
                        document.getElementById('topic_rating_'+idTopic).style.color="#008000";
                }
            }
        }
    }
    req.open(null, DIR_WEB_ROOT+'/include/ajax/voteTopic.php', true);
    req.send( { idTopic: idTopic, value: value } );
}