title: bootstrap-multiselect onDropdownShow doesn't work
body: <p>Using davidstutz's bootstrap-multiselect plugin with twitter bootstrap 3.3.0.
  <a href="http://davidstutz.github.io/bootstrap-multiselect" rel="nofollow">http://davidstutz.github.io/bootstrap-multiselect</a></p>
  
  <p>My purpose is that when i click on the dropdown, i'd like to get a radio button selected, but it doesn't work.</p>
  
  <p><strong>HTML (blade):</strong></p>
  
  <pre><code>{{Form::radio('radio', 'value', null, array('id' =&gt; 'radioID' ,'class' =&gt; 'name', 'autocomplete' =&gt; 'off'))}}
  
  {{Form::select('select', $valuesArray,'', array('id' =&gt; 'selectID' ,'multiselect' =&gt; 'multiselect', 'class' =&gt; 'msdropdown', 'multiple' =&gt; 'multiple', 'autocomplete' =&gt; 'off'))}}
  </code></pre>
  
  <p><strong>JS:</strong></p>
  
  <pre><code>$(document).ready(function(){
      $('#selectID').multiselect({
          onDropdownShow: function(event){
              $('#radioID').prop('checked', true);
          }
      });
  });
  </code></pre>
  
  <p>Thanks in advance.</p>
  
  <p>------------Update-------------</p>
  
  <p>The problem was it was duplicately initialized, before the ('#selectID') section. I removed first one and it worked like a charm.</p>