title: Replace javascript with a local file
body: <p>If I don't have access to the development environment, then I want to have the opportunity to change front-end code on the fly by edit / replace / change javascript files. What I want is to just use the default webpage and just replace a javascript file with a local version. </p>
  
  <p>I've tried adding javascript with this kind of code, with firebug:</p>
  
  <pre><code>$.getScript("mobile.js", function(){
      alert("Running test.js");
  });
  </code></pre>
  
  <p>but how do I replace it with a local file?</p>
  
  <p>I think this is possible with the tool "espresso" (mac users) .. any Windows alternative? </p>