javascript select the part of a string
<p>I have the following HTML:</p>

<pre><code>&lt;li class="workorder" id="workorder_7"&gt;
</code></pre>

<p>I would like to use the digit after the _ in some javascript.
In this case, I need the integer 7</p>

<p>How would I do that?</p>

<p>Thanks!!</p>
