Getting an element's `id` attribute
<p>Can you get the <code>id</code> attribute of a html tag using jQuery or without?</p>

<p>For example:</p>

<pre><code>&lt;ul id="todo" /&gt;
</code></pre>

<p>How can I get the <code>id</code>, without using <code>jQuery("#todo")</code>?</p>

<p>Is there a way for that? Will <code>attr()</code> work?</p>
