title: Style your navigation bar when scrolled 100px from top
body: <p><strong>Hi,</strong></p>
  
  <p>If you take a look at this page > <a href="http://www.wikihow.com/" rel="nofollow">http://www.wikihow.com/</a><br>
  You'll notice the navigation bar height will be less greater when scrolled down. I want to apply this to my navigation bar using jQuery. I've found solutions on google, but people say you'll need some plugins. I think this isn't true, am I right?</p>
  
  <p>Thanks.</p>