Async Load JavaScript Files with Callback

Question

I am trying to write an ultra simple solution to load a bunch of JS files asynchronously. I have the following script below so far. However the callback is sometimes called

Answer 1

jcors-loader.js not working in Internet Explorer...

Index.html

alertme.js

alert("Loaded");

This works fine in chrome and firefox it displays "TEST OK" and popup...But no message or alert in IE(7,8,9)...Any help will be appreciated.