title: bootstrap dropdown open on pageload
body: <p>Ive got this dropdown styled with bootstrap:</p>
  
  <pre><code>&lt;li class="dropdown"&gt;
      &lt;a class="dropdown-toggle" data-toggle="dropdown" href="#" id="posuvnik"&gt;15min &lt;strong class="caret"&gt;&lt;/strong&gt;&lt;/a&gt;
  
      &lt;ul class="dropdown-menu"&gt;
          &lt;li&gt; &lt;a href="#" onclick="setPosuvnik(1)"&gt;15min&lt;/a&gt; &lt;/li&gt;
          &lt;li&gt; &lt;a href="#" onclick="setPosuvnik(2)"&gt;1hod&lt;/a&gt; &lt;/li&gt;
      &lt;/ul&gt;
  &lt;/li&gt;
  </code></pre>
  
  <p>and I want that dropdown menu to be rolled down on a page load, anyone know how to achieve that? thanks in advance :)</p>