Loading js files after page rendering with AJAX?

Question

JavaScript

Please tell me a simple way to implement asynchronous loading of js files on the page after it has been rendered.
Thank you.

Answer 1

form submission to hidden iframe

Answer 2

Simplest:

var scriptEl = document.createElement('script');
scriptEl.setAttribute("type","text/javascript");
scriptEl.setAttribute("src", YOUR_JAVASCRIPT_FILE);
document.getElementsByTagName("head")[0].appendChild(scriptEl);