function disable_register_elements ()
{
  var f = document.getElementById('register-form');
  f.name.disabled=true;
  f.email.disabled=true;
  f.submit.disabled=true;
}

function disable_login_elements ()
{
  var f = document.getElementById('login-form');
  f.email.disabled=true;
  f.password.disabled=true;
  f.submit.disabled=true;
}