title: trigger click event with css selector in prototype
body: <p>I am new in Prototype js. I have an element like this,</p>
  
  <pre><code>&lt;li id="toolbar-save" class="button"&gt;
    &lt;a class="toolbar"  href="www.mydomain.com/register"&gt;
       Save &amp;amp; Close
    &lt;/a&gt;
  &lt;/li&gt;
  </code></pre>
  
  <p>I have a selector for the anchor tag, <code>$$('#toolbar-save a')</code>.
  By using this selector how can I trigger the <strong>click</strong> event ?
  or any other way you can suggest ?
  thanks in advance.</p>