function showHint(e,desc,id) {
        var div = document.getElementById('hintdiv'+id);
        var html = desc;
        div.style.left=e.clientX;
        div.style.top=e.clientY;
        div.style.display = 'inline';
        div.style.visibility= 'visible';
        div.innerHTML = html;
     }
     function hideHint(id) {
        var div = document.getElementById('hintdiv'+id);
        div.style.display = 'none';
        div.style.visibility= 'hidden';
     }