title: Body text goes over the top of fixed nav bar
body: <p>I have a fixed nav bar, that follows when scrolling.</p>
  
  <p>But upon scrolling over text/images within  tags it seems to go in front of the navbar, rather then behind.</p>
  
  <p>Why is this? How can I fix it?</p>
  
  <p><a href="http://jsfiddle.net/6ekd1q46/2/" rel="noreferrer"><strong>Fiddle</strong></a></p>
  
  <p><div class="snippet" data-lang="js" data-hide="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>nav {
    background-color: #262626;
    height: 60px;
    width: 100%;
    position: fixed;
    top: 0;
    bottom: 0;
    -webkit-box-shadow: 0px 0px 8px 0px #000000;
    -moz-box-shadow: 0px 0px 8px 0px #000000;
    box-shadow: 0px 0px 8px 0px #000000;
  }
  nav a {
    font-family: 'Open Sans', sans-serif;
    font-size: 16px;
    line-height: 60px;
    text-transform: uppercase;
    margin: 7px;
  }
  nav a:link {
    color: #C8C8C8;
    -o-transition: .5s;
    -ms-transition: .5s;
    -moz-transition: .5s;
    -webkit-transition: .5s;
    transition: .5s;
  }
  nav a:visited {
    color: #C8C8C8;
  }
  nav a:hover {
    color: #199ABA;
  }
  #menu {
    margin-right: 375px;
    margin-left: 375px;
    text-align: right;
    margin-top: 0px;
    margin-bottom: 0px;
  }
  #headertop {
    margin: 0px;
    width: 100%;
    height: 650px;
    font-family: 'Open Sans', sans-serif;
  }
  #headertop h1 {
    position: absolute;
    margin-left: 375px;
    margin-right: 375px;
    margin-top: 178px;
    line-height: 45px;
    font-size: 50px;
    color: #33CCFF;
    width: 550px;
    height: 100%;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;nav&gt;
    &lt;div id="menu"&gt;
      &lt;strong&gt;&lt;a href="index.html" style="text-decoration:none"&gt;Home&lt;/a&gt;&lt;/strong&gt;
    &lt;/div&gt;
  &lt;/nav&gt;
  &lt;div id="headertop"&gt;
    &lt;h1&gt;THANKS&lt;/h1&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>