By leaving 'simple_search' parameter blank in the _config.yml file, the
search form in the navigation.html include is omitted.  This lets you
put your own custom search form in the custom/navigation.html file.
| ... | ... | @@ -4,10 +4,12 @@ | 
| 4 | 4 |      <li><a href="{{ site.subscribe_email }}" rel="subscribe-email" title="subscribe via email">Email</a></li> | 
| 5 | 5 |    {% endif %} | 
| 6 | 6 | </ul> | 
| 7 | +  {% if site.simple_search %} | |
| 7 | 8 |  <form action="{{ site.simple_search }}" method="get"> | 
| 8 | 9 | <fieldset role="search"> | 
| 9 | 10 |      <input type="hidden" name="q" value="site:{{ site.url | shorthand_url }}" /> | 
| 10 | 11 | <input class="search" type="text" name="q" results="0" placeholder="Search"/> | 
| 11 | 12 | </fieldset> | 
| 12 | 13 | </form> | 
| 14 | +  {% endif %} | |
| 13 | 15 |  {% include custom/navigation.html %} |