title: how can i set space between divs?
body: <p>this is my html/css code:
  <a href="http://jsfiddle.net/8nW7V/" rel="nofollow">JsFiddle code</a></p>
  
  <p>how can i set space between  </p>
  
  <pre><code>nav id="section-navi"
  section class="section" 
  div id="footer-main"
  </code></pre>