title: JQuery: .val() is not working for textarea
body: <p>I am trying to read the content of a textarea, but <code>.val()</code> does not work for my textarea.
  I would be happy, if someone has a solution for me.
  Here's my code:</p>
  
  <p>HTML:</p>
  
  <pre><code>&lt;textarea id="details" class="required" rows="5"&gt;&lt;/textarea&gt;
  </code></pre>
  
  <p>JS:</p>
  
  <pre><code>$.ajax({
        type: "GET",
        url: "reserve.php",
        data: {
              details : $('#details').val(),
              ...
        },
        ...
  });
  </code></pre>
  
  <p>Thank you!</p>