<section class="fixed-menu-left">
  <div class="fixed-menu">
    <ul>      
      <li class="active fmenus" data-inverted="" data-tooltip="Dashboard" data-position="right center"><a href="assignments.php"><img src="images/ndashboard.png"></a></li>
      <li class="fmenus" data-inverted="" data-tooltip="Assignments" data-position="right center"><a href="#"><img src="images/ncompany.png"></a></li>
      <li class="fmenus" data-inverted="" data-tooltip="Invoices" data-position="right center"><a href="#"><img src="images/nprospect.png"></a></li>
        <li class="fmenus" data-inverted="" data-tooltip="Setting" data-position="right center"><a href="#"><img src="images/noperations.png"></a></li>
    </ul>
  </div> 
</section>