js-prettify

gistfile1.js

(function() {
  var prettifyPath = "//jp-cdn.appspot.com/js/prettify/";
  var prettifyJS = prettifyPath + "prettify.js";
  var prettifyCSS = prettifyPath + "prettify.css";

  var jqueryJS = "//jp-cdn.appspot.com//js/jquery.js";
  
  function jQueryExists() { return typeof jQuery !== 'undefined'; }
  
  //get jquery
  if(jQueryExists())
    gotJQuery();
  else {
    document.write('<script src="'+jqueryJS+'"></script>');
    var interval = setInterval(function() {      
      if (jQueryExists()) {      
        clearInterval(interval);            
        gotJQuery();
      }
    }, 100);
  }
  
  //got jquery
  function gotJQuery() {
    $("head").append('<link href="'+prettifyCSS+'" rel="stylesheet"></link>');
    jQuery.ajaxSetup({ cache: false });
    $.getScript(prettifyJS, gotPrettify);
  }
  //prettify!
  function gotPrettify(){
    $(document).ready(window.prettyPrint);
  }

})();