title: onkeyup event in textarea
body: <p>I have a very basic input/output structure in HTML:</p>
  <pre><code>&lt;textarea id=&quot;input&quot; onkeyup=&quot;sendCode()&quot;&gt;
  Hello World!
  &lt;/textarea&gt; 
  
  &lt;div id=&quot;output&quot;&gt;&lt;/div&gt;
  </code></pre>
  <p>And I have JS function that should pass everything from input to output:</p>
  <pre><code>var input = document.getElementById(&quot;input&quot;);
  var output = document.getElementById(&quot;output&quot;);
  
  function sendCode(){
   output.innerHTML = input.innerHTML;
  }
  </code></pre>
  <p>The <code>sendCode()</code> function works when I call it manually, but it seems that <code>onkeyup</code> event not firing in this textarea.</p>
  <p>Here is jsfiddle: <a href="http://jsfiddle.net/mudroljub/y5a2n8ab/" rel="nofollow noreferrer">http://jsfiddle.net/mudroljub/y5a2n8ab/</a></p>
  <p>Any help?</p>
  <p><strong>UPDATE</strong>: jsfiddle is updated and working now.</p>