wmtt = null;

document.onmousemove = updateWMTT;

function updateWMTT(e) {
        x = (document.all) ? window.event.x + document.body.scrollLeft : e.pageX;
        y = (document.all) ? window.event.y + document.body.scrollTop  : e.pageY;
        if (wmtt != null) {
                wmtt.style.left = (x -540) + "px";
                wmtt.style.top  = (y -280) + "px";
        }
}

function showWMTT(id) {
        wmtt = document.getElementById(id);
        wmtt.style.display = "block";
}

function hideWMTT() {
        wmtt.style.display = "none";
}