gistfile1.txt

MathJax.Hub.Config({
  showProcessingMessages: false,
  tex2jax: {
    inlineMath: [
      ['$', '$'],
      ['\\(', '\\)']
    ]
  },
  extensions: [
    'toMathML.js'
  ]
});
var math = null;
MathJax.Hub.queue.Push(function () {
  math = MathJax.Hub.getAllJax('MathOutput') [0];
});

window.updateMathMl = function (math) {
  document.getElementById('output').value = '<?xml version="1.0"?>' + math.root.toMathML('');
};

window.UpdateMath = function (TeX) {
  MathJax.Hub.queue.Push(['Text',
  math,
  '\\displaystyle{' + TeX + '}'], [
    updateMathMl,
    math
  ]);
};