How can I briefly flash a rectangle around a form?
<p>What I want to do is when a user clicks something:</p>

<pre><code>&lt;div id="FormContainer"&gt;
    &lt;form&gt;
     ...
    &lt;/form&gt;
&lt;/div&gt;

&lt;a href="#" onClick="FlashElement()"&gt;Make it flash&lt;/a&gt;
</code></pre>

<p>It briefly flashes a rectangle around the form within the <code>FormContainer</code>. Is there any way I can achieve this?</p>
