title: Events after keypresses (jquery)
body: <p>I have a textarea. After the user types X number of characters in the textarea I want a few different events to fire. </p>
  
  <ul>
  <li>append the first X characters typed into another textfield.</li>
  <li>expand the textarea to give more room to continue typing</li>
  </ul>
  
  <p>I know I can use keypress events in jquery, but how can I set off a event after say 25 characters have been typed?</p>
  
  <p>I'm current trying this:</p>
  
  <pre><code>$('#post-content-field').keyup(function () {
  $('#post-title-field').val($("#post-content-field").val()).trigger('change');
                              });
  </code></pre>