title: keyup not working on dynamically loaded textareas
body: <p>Other event types seem to work fine here - for example, <code>mouseenter</code>:</p>
  
  <pre><code>$("body").delegate(".textareas", "mouseenter", myalert);
  </code></pre>
  
  <p>But using <code>keyup</code>, or <code>keypress</code> - it wont work. I didn't change anything else in my code except the event type on this line. Example:</p>
  
  <pre><code>$("body").delegate(".textareas", "keyup", myalert);
  </code></pre>
  
  <p>I type in a textarea, but now <code>myalert</code> doesn't get called.</p>
  
  <p>I'm using jquery 1.7.1.</p>