title: Javascript: Math.round() per 0.25?
body: <p>I would like to round numbers to the nearest 0.25-value like this:</p>
  
  <pre><code>2.1 -&gt; 2
  2.2 -&gt; 2.25
  3.4 -&gt; 3.5
  5.6 -&gt; 5.5
  9.8 -&gt; 9.75
  9.9 -&gt; 10
  </code></pre>
  
  <p>Is this possible in javascript?
  Thank you in advance!</p>