function toggle_cookie(cookie, state) { let xhr = new XMLHttpRequest(); xhr.open('POST', set_session_url, true); xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded'); xhr.setRequestHeader('X-CSRFToken', csrf_token); xhr.send(cookie + '=' + state); } function toggle_header() { if (document.getElementById('header').style.display == 'flex') { document.getElementById('header').style.display = 'none'; document.getElementById('headerHidden').style.display = 'flex'; toggle_cookie('hide_header', 'on'); } else { document.getElementById('header').style.display = 'flex'; document.getElementById('headerHidden').style.display = 'none'; toggle_cookie('hide_header', 'off'); } }