function openMenu(menuNumber) {
  document.all[menuNumber].style.visibility = 'visible';
}

function closeAllMenus(menuNumber) {
  document.all[menuNumber].style.visibility = 'hidden';
}

function winopen() {
  window.open("win/w_en.htm", "newWindow", "toolbar=no,location=no,directories=no,status=no, menubar=no,scrollbars=no,resizable=no,copyhistory=no,width=400,height=200,left=10,top=30")
}