title: Running an external script in a VAST tag
body: <p>I have a 3rd party script (which does some data analysis in the client browser) that usually gets appended to an ad creative on a display ad.</p>
  
  <p>I would like to append this script to a video ad, using a VAST tag.  I have read the VAST spec, and I have not found an example of running a script in the browser - just examples of calling a server upon specific events.</p>
  
  <p>Can anybody point me to an example of how to append a script to a VAST tag so that it can run code in the browser?</p>
  
  <p>Thanks!</p>