title: JAVASCRIPT - Unhiding a Class
body: <p>I currently have a class in my HTML file, which is set to hidden in my external CSS file. The class is titled "a."</p>
  
  <p>In my CSS file, I have done this:</p>
  
  <pre><code>.a{
      display: none;
  }
  </code></pre>
  
  <p>In my external Javscript file, I want to unhide this class. How would I do this? I have currently tried the following:</p>
  
  <pre><code>document.getElementsByClassName('a').style.visibility = visible/block;
  </code></pre>
  
  <p>But this hasn't worked.</p>
  
  <p>Thank you.</p>