gistfile1.js

// http://davidwalsh.name/lazy-load-elements
$('article pre').length && (function() {
        var mediaPath = '/assets/';

        $('<link>').attr({
            type: 'text/css',
            rel: 'stylesheet',
            href: mediaPath + 'css/syntax.css'
        }).appendTo(document.head);

        var syntaxScript = document.createElement('script');
        syntaxScript.async = 'true';
        syntaxScript.src = mediaPath + 'js/syntax.js';
        doc.body.appendChild(syntaxScript);
    })();