title: Add <br> between text in string
body: <p>I've the following function:</p>
  
  <pre><code>var index = 0;
  var text = 'Hello world!';
  function type() {
    document.getElementById('screen').innerHTML += text.charAt(index);
    index += 1;
    var t = setTimeout('type()',200);
  }
  </code></pre>
  
  <p>I want to know if is possible to make it add a br tag between the words hello and world. </p>
  
  <p>I tried like that: 'hello' + br tag + 'world'; but didn't work, probably because of the charAt.</p>
  
  <p>Thanks</p>