title: detect and suppress errors loading javascript file
body: <p>I want to source a javascript file from facebook <a href="http://connect.facebook.net/en_US/all.js" rel="noreferrer">http://connect.facebook.net/en_US/all.js</a> </p>
  
  <p>The organization I work for has a firewall that blocks access to Facebook, it just goes to an html page that says "Access Denied blah blah blah"  </p>
  
  <p>I want to be able to put a javascript src tag <code>&lt;script src="http://... "&gt; &lt;/script&gt;</code> and detect and suppress the warnings when the browser tries to evaluate the html as javascript.</p>
  
  <p>Anyone know how?</p>