function OpenMenu() {
  window.open( "webbmeny.aspx", "Webbmeny", "height=450,width=650,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no" )
}

function showMe(id) {
  div = document.getElementById(''+id+'');
  if ( div.style.visibility != 'hidden' ) {
    div.style.visibility = 'hidden';
    div.style.display = 'none';
  }
  else {
    div.style.visibility = 'visible';
    div.style.display = 'block';
  }
}