title: Reset Dropdown Menu to First Option After OnClick
body: <p>I have a drop down menu like below:</p>
  
  <pre><code>&lt;select onChange="window.open(this.value)"&gt;
  &lt;option selected="selected" value=""&gt;--select an url--&lt;/option&gt;
  &lt;option value="URL1"&gt;URL1&lt;/option&gt;
  &lt;option value="URL2"&gt;URL2&lt;/option&gt;
  &lt;option value="URL3"&gt;URL3&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>I would like to have the dropdown menu return to "--select an url--" option,
  instead of URL option,
  everytime after a selection was made.</p>
  
  <p>Can someone show me how to implement the codes? 
  Thanks.</p>