title: Select the first enabled option in a select element
body: <p>How could I set the value of a select element to the first enabled option?
  Say I have html like this:</p>
  
  <pre><code>&lt;select name="myselect" id="myselect"&gt;
      &lt;option value="val1" disabled&gt;Value 1&lt;/option&gt;
      &lt;option value="val2"&gt;Value 2&lt;/option&gt;
      &lt;option value="val3" disabled&gt;Value 3&lt;/option&gt;
      &lt;option value="val4"&gt;Value 4&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>How could I select the first option which isn't disabled (here it would be val2)?</p>