title: jQuery - If DIV is present on page then add CSS to other DIV
body: <p>I'm very new to jQuery BUT I've got the basics down... At least I think I do?  I'm just not sure how to put them together for them to actually work. </p>
  
  <p><strong>Example:</strong><br>
  IF (div with ID of #dynamicChat) is present on the page.  Then (div with class of .prdSection) height is 25px. Else do nothing</p>
  
  <p><strong>What I have so far:</strong></p>
  
  <pre><code>$('#dynamicChat'){
  $('.prdSection').css('height', '25px');
  }
  </code></pre>
  
  <p>I don't think I'm far off... Saying that I probably am :)  Any help would be great!  </p>
  
  <p>*Side question - If I'm referring to a Div on a page, what would I call it?  An Element?  </p>
  
  <p>Thanks :)</p>