loader.js

(function () {
debugger;
    var arr, counter = 0,
        doc = document,
        len, load, callBack, url = 'http://alexgorbatchev.com/pub/sh/current/';
  
    if (window.SyntaxHighlighter && !window.SyntaxHighlighterLoading) {
        SyntaxHighlighter.highlight();
    } else if (!window.SyntaxHighlighterLoading) {
        window.SyntaxHighlighterLoading = true;
        arr = [url + 'scripts/shCore.js',
               url + 'scripts/shBrushCSharp.js',
               url + 'scripts/shBrushJScript.js',
               url + 'styles/shCore.css',
               url + 'scripts/shBrushXml.js',
               'https://raw.github.com/scottdensmore/ObjectiveCSyntaxHighlighter/master/scripts/shBrushObjC.js',
               url + 'styles/shCoreDefault.css'];
      
        len = arr.length;
      
        load = function (src, callBack) {
            var isJs = src.lastIndexOf('.js') !== -1,
                head = doc.getElementsByTagName('head')[0],
                el, img;

            if (isJs) //load javascript
            {
                el = doc.createElement('script');
                el.type = 'text/javascript';
                el.src = src;
                el.onload = callBack;
                head.appendChild(el);
            } else //load css
            {
                el = doc.createElement('link');
                el.href = src;
                el.type = 'text/css';
                el.rel = 'stylesheet';
                head.appendChild(el);
                //not all browser support onload event on link elements - for example safari mac 5.1.7--
                //in order to simulate load event on link elements use a known trick
                img = doc.createElement('img');
                img.onerror = callBack;
                img.src = src;
            }
        };
      
        callBack = function () {
            if (++counter === len) {
                SyntaxHighlighter.highlight();
                window.SyntaxHighlighterLoading = false;
            } else {
                load(arr[counter], callBack);
            }
        };
      
        load(arr[counter], callBack);
    }
}());