JavaScript syntax highlighter.js

      // All elements which match this will be syntax highlighted.
      var selector = 'code';

      var keywords = ('var function if else for while break switch case do new '
                     +'continue delete return this true false throw catch typeof').split(' ');

      // Syntax definition
      // The key becomes the class name of the <span>
      // around the matched block of code.
      var syntax = {
        'comment': /(\/\*(?:[^*]|\*+[^\/*])*\*+\/|\/\/[^\n]*)/mg,
        'string' : /("(?:(?!")[^\\]|\\.)*"|'(?:(?!')[^\\]|\\.)*')/g,
        'regexp' : /(\/.*\/[mgi]*)(?!\w)/g,
        'class'  : /\b([A-Z][a-z]+)\b/g,
        'number' : /\b([0-9]+(?:\.[0-9]+)?)\b/g,
        'keyword': new(RegExp)('\\b(' + keywords.join('|') + ')\\b', 'g')
      };
      var nodes = document.querySelectorAll(selector);

      for (var i = 0, children; i < nodes.length; i++) {
          children = nodes[i].childNodes;

          for (var j = 0, str; j < children.length; j++) {
              code = children[j];

              if (code.length >= 0) { // It's a text node
                  Object.keys(syntax).forEach(function (s) {
                      code.nodeValue = code.nodeValue.replace(syntax[s], function (_, m) {
                          return '{#' + s + '#' + encode(m) + '#}';
                      });
                  });
              }
          }
      }
      for (var i = 0; i < nodes.length; i++) {
          nodes[i].innerHTML =
              nodes[i].innerHTML.replace(/\{#([a-z]+)#(.*?)#\}/g, function (_, name, value) {
                  return '<span class="' + name + '">' + decode(value) + '</span>';
          });
      }

      // Encode ASCII characters to, and from Braille
      function encode (str) {
          return str.split('').map(function (s) {
              if (s.charCodeAt(0) > 127) { return s }
              return String.fromCharCode(s.charCodeAt(0) + 0x2800);
          }).join(' ');
      }
      function decode (str) {
          return str.trim().split(' ').map(function (s) {
              if (s.charCodeAt(0) - 0x2800 > 127) { return s }
              return String.fromCharCode(s.charCodeAt(0) - 0x2800);
          }).join('');
      }