File content as of revision 91:8b192efd0288:

//Radiator script
'use strict';

let   hallTemperature  = '';
let programTimerOutput = false;
let radiatorMode       = false;
let radiatorOverride   = false;
let radiatorPump       = false;
let nightSetPoint      = '';
let frostSetPoint      = '';

function parse()
{
    let lines = Ajax.response.split('\n');
    hallTemperature    = OneWire.parseDS18B20    (lines[0]);
    programTimerOutput =    Ajax.hexToBit        (lines[1], 0);
    radiatorMode       =    Ajax.hexToBit        (lines[1], 1);
    radiatorOverride   =    Ajax.hexToBit        (lines[1], 2);
    radiatorPump       =    Ajax.hexToBit        (lines[1], 3);
    nightSetPoint      =    Ajax.hexToSignedInt16(lines[2], 16);
    frostSetPoint      =    Ajax.hexToSignedInt16(lines[3], 16);
}
function display()
{
    let elem;
    elem = Ajax.getElementOrNull('ajax-hall-html'      ); if (elem) elem.textContent =   hallTemperature.toFixed(1);
    elem = Ajax.getElementOrNull('ajax-program-toggle' ); if (elem) elem.setAttribute('dir', programTimerOutput ? 'rtl' : 'ltr');
    elem = Ajax.getElementOrNull('ajax-mode-toggle'    ); if (elem) elem.setAttribute('dir', radiatorMode       ? 'rtl' : 'ltr');
    elem = Ajax.getElementOrNull('ajax-override-toggle'); if (elem) elem.setAttribute('dir', radiatorOverride   ? 'rtl' : 'ltr');
    elem = Ajax.getElementOrNull('ajax-radiator-toggle'); if (elem) elem.setAttribute('dir', radiatorPump       ? 'rtl' : 'ltr');
    elem = Ajax.getElementOrNull('ajax-night-set-point'); if (elem) elem.value = nightSetPoint;
    elem = Ajax.getElementOrNull('ajax-frost-set-point'); if (elem) elem.value = frostSetPoint;
}

Ajax.server     = '/radiator-ajax';
Ajax.onResponse = function() { parse(); display(); };
Ajax.init();