Lazy Loading Asyncronous Javascript

from http://friendlybit.com/js/lazy-loading-asyncronous-javascript/#comments

(function() {
function async_load(){
var s = document.createElement(‘script’);
s.type = ‘text/javascript’;
s.async = true;
s.src = ‘http://yourdomain.com/script.js’;
var x = document.getElementsByTagName(‘script’)[0];
x.parentNode.insertBefore(s, x);
}
if (window.attachEvent)
window.attachEvent(‘onload’, async_load);
else
window.addEventListener(‘load’, async_load, false);
})();

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