How can I tell if an object is blank?
<p>If I set an object using:</p>

<pre><code>var a = {};
</code></pre>

<p>or </p>

<pre><code>var a = new Object();
</code></pre>

<p>How can I test whether or not it has anything inside it if I don't know specifically what to test for.</p>

<p>(something like a == {}, but this does not evaluate correctly)</p>
