title: how to append to a object with innerHTML
body: <p>Is there a way to add information to a DOM object with .innerHTML without replacing what exists there?</p>
  
  <p>For example: <code>document.getElementById('div').innerHTML = 'stuff';</code></p>
  
  <p>Would return <code>&lt;div id="div"&gt;stuff&lt;/div&gt;</code></p>
  
  <p>And then a similar call: <code>document.getElementById('div').innerHTML = ' and things';</code></p>
  
  <p>Would set the div to <code>&lt;div id="div"&gt;stuff and things&lt;/div&gt;</code></p>