title: How to change the duration of a CSS3 keyframes-animation with raw JavaScript
body: <p>Is there a way to change the duration of a CSS3 keyframes animation with JavaScript? In CSS you can do that with the animation-duration property:</p>
  
  <pre><code>animation-duration: 1s;
  </code></pre>
  
  <p>The JavaScript should be raw, i don't want to include jQuery or other JS librarys into my site.</p>