title: Add value continuously
body: <p>I have a textarea and a button and i want to add continuously the value to the textarea.
  For example if i click the button twice, the textarea should display "aa", and if i click three times "aaa" and so on, basicly always add to a string if i click the button</p>
  
  <p>Here is the code i have come up so far: </p>
  
  <pre><code>&lt;textarea readonly="readonly" id="textarea"&gt;&lt;/textarea&gt;
  &lt;input type ="button" value="a" id="button"/&gt;
  
  $(document).ready(function() {
  $('#button').click(function() {
  
   $('#textarea').val(1);
   });
  
  });
  </code></pre>