function loginPopUp() {
	  var block = document.getElementById('login-block');
	  if(block.style.display == 'block') block.style.display = 'none';
	  else block.style.display = 'block';
	  return false;
  }
  
  function logout() {
	  var logoutForm = document.getElementById('logoutForm');
	  logoutForm.submit();
	  return false;
  }