function promotion(e,show) {
        var el = document.getElementById('promotion');
        if (!el)
                return;
        if (!e) var e = window.event;

        var theTop = 0;
        if (document.documentElement && document.documentElement.scrollTop)
                theTop = document.documentElement.scrollTop;
        else if (document.body)
                theTop = document.body.scrollTop

        if (show) {
                el.style.left = e.clientX -10 + 'px';
                el.style.top = e.clientY + theTop - el.offsetHeight + 0 + 'px';
                el.style.visibility = 'visible';
        }
        else {
                if (    e.clientX > el.offsetLeft && e.clientY+theTop > el.offsetTop &&
                        e.clientX < el.offsetLeft+el.offsetWidth && e.clientY+theTop < el.offsetTop+el.offsetHeight) { }
                else
                        el.style.visibility = 'hidden';
        }
}