title: scroll() and scrollTop() not working
body: <p>I'd like to create a 'go-to-top'-button via jquery - but scroll() and scrollTop() aren't working...</p>
  
  <p>Here's my setup:</p>
  
  <pre><code>&lt;div id="go_top"&gt;go to top&lt;/div&gt;
  </code></pre>
  
  <p>and CSS</p>
  
  <pre><code>#go_top {
  position: fixed;
  right: 2em;
  bottom: 2em;
  color: #000;
  background-color: rgba(167, 204, 35, 0.6);
  font-size: 12px;
  padding: 1em;
  cursor: pointer;
  display: none;
  }
  #go_top:hover {
  color: #000;
  background-color: rgba(167, 204, 35, 1);
  }
  </code></pre>
  
  <p>Therefore, I setup the following jquery:</p>
  
  <pre><code>$(document).ready(function() {
  $(window).scroll(function() {
      if ($(this).scrollTop() &gt; 200) {
          $('#go_top').fadeIn(200);
      } else {
          $('#go_top').fadeOut(100);
          }
  }
  
  
  });
  </code></pre>
  
  <p>But it's not working. The div just won't show :(</p>