gistfile1.js

(function(d){
        var scrs=d.getElementsByTagName("script");
        var scr=scrs[scrs.length-1];
        var w=window;
        function n(){
                var e=d.createElement("script");
                e.async=true;
                e.src=("https:"==d.location.protocol?"https://":"http://")+"example.org/path/to/javascript.js";
                scr.parentNode.insertBefore(e,scr);
        }
        function s(){
                f=w.setTimeout(n,1); // Webkit fix
        }
        if (w.attachEvent) w.attachEvent('onload', s);
        else w.addEventListener('load', s, false);
})(document);

/*
This is a method to do non-blocking lazy loading of javascript.

Description
What this does is that if you have an external script on your website 
which has a slow connection, this slow connection will not affect the 
apparent load. While a non-blocking asynchronous setup  will not block 
the load of the webpage, it will still show up in the progress bar. 
What we do to prevent this, is that we first add the asynchronous load 
after the window has sent the load event. In Webkit I had to run it right 
after the load event, so there is an added 1 ms.

Features
* Insert external script the same place as this script
* Adds an asynchronous (non-blocking) external load
* Loads the script AFTER the page itself has loaded, thus not "slowing" the load experience
* Minified function/element names

Tested
Tested with IE 9, Chrome 26, Safari 6, Firefox 19. Should work with all modern browsers.

Idea
http://friendlybit.com/js/lazy-loading-asyncronous-javascript/
*/