function privacy() {
  window.open('privacy.html',
              'ARTLAB',
              'scrollbars=yes,menubar=no,height=600,width=500,resizable=yes,toolbar=no,location=no,status=no');
}
function account() {
  window.open('account.html',
              'ARTLAB_account',
              'scrollbars=yes,menubar=no,height=600,width=500,resizable=yes,toolbar=no,location=no,status=no');
}
function regcomnecting() {
  window.open('regolamento_comnecting.html',
              'ARTLAB_comnecting',
              'scrollbars=yes,menubar=no,height=600,width=700,resizable=yes,toolbar=no,location=no,status=no');
}