JavaScript: Code hightlighter

code_hightlighter.js

/*
.js-type {font-weight:700}
.js-variable, .js-type{color: #228}
.js-keyword{color: #708}
.js-string {color:#a22}
.js-punctuation {color:#666}
.js-atom {color:#281}
.js-comment, .js-comment * {color: #A70!important}
*/
String.prototype.hightlight = function(){
  return this
  // операторы
  .replace(/\b(var|function|typeof|new|return|if|for|in|while|break|do|continue|switch|case|try|catch)([^a-z0-9\$_])/g,
  '<span class="js-keyword">$1</span>$2')
  // типы данных, объекты
  .replace(/\b(RegExp|Boolean|Number|String|Array|Object|Function|this|true|false|NaN|undefined|null|Infinity)([^a-z0-9\$_])/g,
  '<span class="js-type">$1</span>$2')
  // скобки
  .replace(/(\{|\}|\]|\[|\|)/gi,'<span class="js-punctuation">$1</span>')
  // комментарии
  .replace(/(\/\*[^]*?\*\/|(\/\/)[^\n\r]+)/gim,'<span class="js-comment">$1</span>')
  // строки
  .replace(/('.*?')/g,'<span class="js-string">$1</span>')
  // названия функций
  .replace(/([a-z\_\$][a-z0-9_]*)\(/gi,'<a name="$1" class="js-variable">$1</a>(')
  // числа
  .replace(/(0x[0-9a-f]*|\b(\d*\.)?([\d]+(e-?[0-9]*)?)\b)/gi,'<span class="js-atom">$1</span>')//|(0x[0-9abcdefx]*)
  // табуляция (2 пробела)
  .replace(/\t/g,'  ');
}