title: Where do I define the instance ID to start?
body: <p>I haven't found an answer for this yet, and I've tried putting the instance ID I want to turn off/on:</p>
  
  <pre><code>ec2 = aws.createEC2Client(yourAccessKeyId, yourSecretAccessKey);
  
  ec2.call("StartInstances", {}, function(err, result) {
    console.log(result);
  })
  </code></pre>
  
  <p>Where in that script do I need to define the instance I want to start?</p>