title: Get part of string?
body: <p>I have a string formatted like this:</p>
  
  <p><code>item_questions_attributes_abc123_id</code></p>
  
  <p>I'm specifically trying to get the <code>abc123</code> bit. That string can be any alphanumeric of any case. No special characters or spaces.</p>
  
  <p>I'm using jQuery, though I'm certainly fine with using straight javascript if that's the best solution.</p>