Return only text after last underscore in JavaScript string
<p>If I have a string like so:</p>

<pre><code>var str = 'Arthropoda_Arachnida_Zodariidae_Habronestes_hunti';
</code></pre>

<p>How can I get just the last part of the string after the last underscore?</p>

<p>And in the case there are no underscores just return the original string.</p>

<p>In this case I want just <code>'hunti'</code></p>
