load js script from blank page browser (execute following code in the browser console)

console-load-js-script.js

(function(root){
  root.getScript = function(url) {
    var script = document.createElement('script');
    script.type = 'text/javascript';
    script.src = url;
    document.head.appendChild(script);
  }
}(window));

getScript('http://cdnjs.cloudflare.com/ajax/libs/jquery/2.0.3/jquery.js');