title: Capitalize the string but not first three lettres
body: <p>I have strings based on airports codes, name and location.</p>
  
  <p>i.e. : </p>
  
  <pre><code>var s = "BRU – Brussels National, Brussels, BELGIUM";
  </code></pre>
  
  <p>The point here is to capitalize the string to get "Belgium" instead of "BELGIUM" but to keep the first tree letters upperCase. </p>
  
  <p>How can I do this using jQuery or pure JavaScript ? </p>
  
  <p>The output I need : </p>
  
  <pre><code>BRU - Brussels National, Brussels, Belgium
  </code></pre>
  
  <p>My try (the new string needs to populate a <code>&lt;span&gt;</code> content) : </p>
  
  <pre><code>$("#airport").html(s.toLowerCase()).css('text-transform', 'capitalize');
  </code></pre>
  
  <p>But the result when the <code>&lt;span&gt;</code> is rendered is : </p>
  
  <pre><code>Bru - Brussels National, Brussels, Belgium
  </code></pre>
  
  <p>How to keep the first three letters upperCase ? </p>
  
  <p>Any tips are welcome and will be appreciated. </p>
  
  <p>Thank you. </p>