var TID = '';

function obre_menu (nmen, tmen) {
   for (n = 0; n < tmen; n++) {
      if (n == nmen) {
         h = document.getElementById ('tabl' + n).offsetHeight;
         t = document.getElementById ('area' + n).offsetTop +
             document.getElementById ('menus').offsetTop;
         document.getElementById ('menu' + n).style.top = t + 'px';
         document.getElementById ('menu' + n).style.height = h + 'px';
         document.getElementById ('menu' + n).style.visibility   = 'visible';
      } else {
         document.getElementById ('menu' + n).style.visibility   = 'hidden';
      }
   }
}

function tanca_menus (tmen) {
   for (n = 0; n < tmen; n++) {
      document.getElementById ('menu' + n).style.visibility   = 'hidden';
   }
}