title: Get the selected value in a dropdown using jQuery.
body: <p>My HTML is below. I need to get the selected value (<code>Scheduled</code>) using the 
  <code>&lt;select&gt;</code> tag. How can this be done using jQuery?</p>
  
  <pre><code>&lt;select id="availability" style="display: none;"&gt;
    &lt;option value="Available"&gt;Available&lt;/option&gt;
    &lt;option selected="selected" value="Scheduled"&gt;Scheduled&lt;/option&gt;
    &lt;option value="Unavailable"&gt;Unavailable&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>I did a <code>jQuery("#availability")</code> to get the select tag, but I do not know how to get the selected options' value.</p>