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HTML

CSS

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Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

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HTML

              
                <div class="container">

  <aside class="sticky">
    <ul>
      <li>Home Page</li>
      <li>Sub Page</li>
      <li>About US</li>
      <li>Buy App</li>
      <li>Contact</li>
      <li class="hide top"><a href="#">Back To Top</a></li>
    </ul>
  </aside>
  <section>
  <img src="http://lorempixel.com/500/400/technics"/>
  <p>This app does everything you could possibly want it to do and not only that, it is beautifully designed and extremely intuitive to use. Download it from the App Store for FREE if you don’t mind some adverts popping up or if you prefer an ad-free experience then you can down load the ad-free version for 99p.</p>
 
    <h2>Who is this app aimed at?</h2>
  <p>Everyone who could possibly need to do anything! It really is the full experience.</p>
 
  <h2>That’s a big claim, does it really work?</h2>
<p>Yes it does and has been given 5 out of 5 stars on all the reviews we’ve seen so far, so download it now and let us know what you think.</p>
 <div>
   <h1>Here are just some of the fantastic reviews that we are very humbled to say our app has received:</h1>
 <br> <br>
“I love this app, I couldn’t be without it now.” ★★★★★
 <br> <br>
“Where has this app been all my iPhone owning life?” ★★★★★
 <br> <br>
“It’s official – my Blackberry is complete!” ★★★★★
 <br> <br>
“This app actually does everything it says and does it well, with style.” ★★★★★
   <br> <br>
  </div>
  </section>
</div>
              
            
!

CSS

              
                @import url(https://fonts.googleapis.com/css?family=Open+Sans);
body {
  position: relative;
  font-family: 'Open Sans';
  color: #1B1B1B;
  font-size: 16px;
  line-height: 24px;
  background: #DEDEDE;
}
.container {
  width: 960px;
  margin: auto;
}
section {
  width: 600px;
  float: right;
  overflow: hidden;
  display:block;
}
aside {
  margin-top: 100px;
  background-color: #1e2027;
  height: 500px;
  float: left;
  width: 250px;
  padding-top: 50px;
}
ul li {
  padding-left: 20px;
  padding-top: 20px;
  color: #fff;
  font-weight: bold;

}
a {
  text-decoration: none;
  color: #fff;
}
section div {
  width: 90%;
  margin: auto;
  margin-top: 30px;
}
section div h1 {
  font-size: 24px;
  padding: 20px 0px;
  font-weight: bold;
}
p {
  padding-left: 20px;
  padding-bottom: 15px;
}
h2 {
  font-weight: bold;
  font-size: 18px;
    padding-left: 20px;
}
.fixed {
  position: fixed;
  margin-top: 0px;
}
.hide {
  display: none;
}

              
            
!

JS

              
                var offset = $('.sticky').offset();
$(window).scroll(function(e) {
  if(window.scrollY >= offset.top) { 
      $('.sticky').addClass('fixed');
      $('.top').removeClass('hide');
  }  else {
      $('.sticky').removeClass('fixed');
      $('.top').addClass('hide');
  }
});

$('.top a').click(function(){
  $(document.body).animate({scrollTop : 0},800);
  return false;
});
              
            
!
999px

Console