This should have been in that uninlining commit

design/publicheader.php

   <link rel="shortcut icon" href="favicon.ico?v=<?=md5_file('favicon.ico');?>" />
   <link href="<?=STATIC_SERVER ?>styles/public/style.css?v=<?=filemtime(SERVER_ROOT.'/static/styles/public/style.css')?>" rel="stylesheet" type="text/css" />
 <?
-  $Scripts = ['jquery', 'script_start', 'ajax.class', 'cookie.class', 'storage.class', 'global'];
+  $Scripts = ['jquery', 'script_start', 'ajax.class', 'cookie.class', 'storage.class', 'global', 'public'];
   foreach($Scripts as $Script) {
     if (($ScriptStats = G::$Cache->get_value("script_stats_$Script")) === false || $ScriptStats['mtime'] != filemtime(SERVER_ROOT.STATIC_SERVER."functions/$Script.js")) {
       $ScriptStats['mtime'] = filemtime(SERVER_ROOT.STATIC_SERVER."functions/$Script.js");

static/functions/public.js

+if ($('#no-cookies')) {
+  cookie.set('cookie_test', 1, 1);
+  if (cookie.get('cookie_test') != null) {
+      cookie.del('cookie_test');
+  } else {
+      $('#no-cookies').gshow();
+  }
+}
+
+$(() => {
+  if ($('#bg_data')) {
+    $('#content')[0].style.backgroundImage = "url(/misc/bg/"+$('#bg_data')[0].attributes.bg.value+")";
+  }
+})