mathjax custom configuration test (mathjax-user group question)

config.js

window.MathJax = {
    jax: ["input/TeX", "output/HTML-CSS"],
    extensions: ["tex2jax.js","TeX/AMSmath.js","TeX/AMSsymbols.js",
                 "TeX/noUndefined.js"],
    TeX: {
        Macros: {
            RR: '{\\bf R}',
            bold: ['{\\bf #1}', 1],
            pd: ["{\\frac{\\partial #1}{\\partial #2}}",2],
           // etc....
        }
    },
    tex2jax: {
        inlineMath: [ ["\\(","\\)"],['$','$'] ],
        displayMath: [ ['$$','$$'], ["\\[","\\]"], ["\\begin{displaymath}","\\end{displaymath}"] ],
        skipTags: ["script","noscript","style","textarea","pre","code"],
        ignoreClass: "tex2jax_ignore",
        processEscapes: false,
        processEnvironments: true,
        preview: "TeX"
    },
    showProcessingMessages: true,
    displayAlign: "center",
    displayIndent: "2em",

    "HTML-CSS": {
        scale: 100,
        availableFonts: ["STIX","TeX"],
        preferredFont: "TeX",
        webFont: "TeX",
        imageFont: "TeX",
        showMathMenu: true,
    },
    MMLorHTML: {
        prefer: {
            MSIE:    "MML",
            Firefox: "MML",
            Opera:   "HTML",
            other:   "HTML"
        }
    }
};