How to dynamically load Cascading Style Sheet (CSS) and JS sources within Javascript

• CSS
• EN
• Javascript

Loading JavaScript

simple

var oScript = document.createElement('script');
oScript.src = 'URL';
document.head.appendChild(oScript);

with callback

var oScript = document.createElement('script');
oScript.onload = function () {
    // ...code...
};
oScript.src = 'URL';
document.head.appendChild(oScript);

Loading CSS

var oLink  = document.createElement('link');
oLink.id   = cssId;
oLink.rel  = 'stylesheet';
oLink.type = 'text/css';
oLink.href = 'URL';
oLink.media = 'all';

var oHead  = document.getElementsByTagName('head')[0];
oHead.appendChild(oLink);