 s = document.getElementById('s3');
    s.MathJax = {};
    MathJax.Hub.formatError(s, new Error('ERROR MESSAGE'));

    s = document.getElementById('s2');
    s.MathJax = {};
    MathJax.Hub.Config({errorSettings: { message: ["[",["MathError","MathError"],"]"] }});
    MathJax.Hub.formatError(s, new Error(''));
  });

  /* FontWarnings */
  MathJax.Hub.config.extensions.push("FontWarnings.js");
  MathJax.HTML.Cookie.Set("fontWarn", { warned: false });
  function displayFontWarning(aSignal, aAvailableFonts)