title: Grabbing number from id tag
body: <p>I have the following:</p>
  
  <pre><code>&lt;ul style="display: block;"&gt;
  
  &lt;li id="deviceTree_3" class="device"&gt;
  
  &lt;div class="tree-itemBody "&gt;
  
  &lt;div class="triCheck"&lt;/div&gt;
  
  &lt;div class="tree-arrowPlaceholder"&gt;&lt;/div&gt;
  
  &lt;span class="tree-itemContent"&gt;Bath Vanity (na)&lt;/span&gt;
  
  &lt;/div&gt;
  &lt;/li&gt;
  </code></pre>
  
  <p>The idea is to get the number after the deviceTree_#</p>
  
  <p>The issue im running into is the number can be various lengths ie ....583 or 3 </p>
  
  <p>is this a regex situation or is there something a simpler solution </p>