title: Smooth scroll with navbar fixed top
body: <p>i have a little question. I use smooth-scroll,its perfect... but when i use a navbar fixed top?
  My problem is when i click on link the anchor div its under the navbar. The navbar have height 154px and the code are simplyfy to this:</p>
  
  <pre><code>&lt;header id="navbar" style="position: fixed; right: 0; left: 0; z-index: 1; height: 154px;"&gt;
      &lt;a href="#anch1"&gt;Anchor 1&lt;/a&gt;
      &lt;a href="#anch2"&gt;Anchor 2&lt;/a&gt;
  &lt;/header&gt;
  &lt;div id="anch1"&gt;...&lt;/div&gt;
  &lt;div id="anch2"&gt;...&lt;/div&gt;
  </code></pre>
  
  <p>how can I lower my anchor anchor point?</p>