title: Collapsible bootstrap, show first element
body: <p>I want to show the first element of this collapsible accordion. I did some research in internet but in vain </p>
  
  <p><div class="snippet" data-lang="js" data-hide="false">
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  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"&gt;&lt;/script&gt;
  &lt;link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet" integrity="sha256-7s5uDGW3AHqw6xtJmNNtr+OBRJUlgkNJEo78P4b0yRw= sha512-nNo+yCHEyn0smMxSswnf/OnX6/KwJuZTlNZBjauKhTK0c+zT+q5JOCx0UFhXQ6rJR9jg6Es8gPuD2uZcYDLqSw==" crossorigin="anonymous"&gt;
  &lt;script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" integrity="sha256-KXn5puMvxCw+dAYznun+drMdG1IFl3agK0p/pqT9KAo= sha512-2e8qq0ETcfWRI4HJBzQiA3UoyFk6tbNyG+qSaIBZLyW9Xf3sWZHN/lxe9fTh1U45DpPf07yj94KsUHHWe4Yk1A==" crossorigin="anonymous"&gt;&lt;/script&gt;
  
  &lt;div class="accordion" id="accordion2"&gt;
    &lt;div class="accordion-group"&gt;
      &lt;div class="accordion-heading"&gt;
        &lt;a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion2" href="#collapseOne" &gt;
          Aller au dossier personnel d'un agent
        &lt;/a&gt;
      &lt;/div&gt;
      &lt;div id="collapseOne" class="accordion-body collapse" style="height: 0px; "&gt;
        &lt;div class="accordion-inner"&gt;
          &lt;form action="goToAgent.do" method="post"&gt;
            &lt;p align="center"&gt;
              &lt;input type="hidden" value="identite" name="retour"&gt;
              &lt;label for="nomPrenom" &gt;
                Entrer le nom complet de l'agent:
              &lt;/label&gt;
              &lt;input type="text" name="nomPrenom" class="typeahead" /&gt; &lt;br&gt;
              &lt;input type="submit" value="appliquer" class="btn btn-info" /&gt;
          &lt;/form&gt;
        &lt;/div&gt;
      &lt;/div&gt;
    &lt;/div&gt;
    &lt;div class="accordion-group"&gt;
      &lt;div class="accordion-heading"&gt;
        &lt;a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion2" href="#collapseTwo"&gt;
          Ajout d'un nouveau fonctionnaire
        &lt;/a&gt;
      &lt;/div&gt;
      &lt;div id="collapseTwo" class="accordion-body collapse"&gt;
        &lt;div class="accordion-inner"&gt;
          &lt;!-- lorem --&gt;
        &lt;/div&gt;
      &lt;/div&gt;
    &lt;/div&gt;
  &lt;/div&gt;</code></pre>
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