title: Find an element by class name, from a known parent element
body: <p>I want to find an element by class name. I know it will appear in a particular parent div, so rather than search the entire dom, I'd like to search only the particular div. I am trying this, but does not seem to be the correct syntax:</p>
  
  <pre><code>var element = $("#parentDiv").(".myClassNameOfInterest");
  </code></pre>
  
  <p>what's the right way to do that?</p>
  
  <p>Thanks</p>