<form id="sm_search_member_form" action="javascript:;" method="post">
  <input type="text" id="sm_search_member_input" value="" placeholder="Votre nom ou numéro..." required>
  <button type="submit" class="btn--primary" id="sm_search_member_button">Recherche</button>
</form>
<div class="search_member_results_area" style="display:none;">
  <div>
    <p>Vous êtes (cliquez sur votre nom) :</p>
  </div>
  <div class="search_member_results"></div>
</div>