function show(menu) {

    document.getElementById(menu).style.visibility = 'visible';

    //document.getElementById(menu).style.display = 'float';

    //if ((document.getElementById('active').value != '') && (document.getElementById('active').value != menu)) {

    //   hide(document.getElementById('active').value)

    //}

    //document.getElementById('active').value = menu

  }



  function hide(menu) {

   if (menu != '') {

    document.getElementById(menu).style.visibility = 'hidden';

    //document.getElementById(menu).style.display = 'float';

   }

  }