load script

load_script.js

function loadScript (url, callback) {
      // Adding the script tag to the head as suggested before
      var head = document.head;
      var script = document.createElement('script');
      script.type = 'text/javascript';
      script.src = url;

      // Then bind the event to the callback function.
      // There are several events for cross browser compatibility.
      script.onreadystatechange = callback;
      script.onload = callback;

      // Fire the loading
      // script.async=false; // cargar ya
      head.appendChild(script);
}

var myPrettyCode = function() {
      console.log("OK!");      
}  ;
    
loadScript("my_script.py", myPrettyCode);