UI Accordion icons not showing up

I can't figure out why icons are not showing up.  I have searched for the last week but have not found a solution.

Please help.

 <script>
 $(function() {
    $( "#accordion" ).accordion({
      heightStyle: "content"
    });
   
    $("#accordion").accordion("option", "icons",
        { 'header': 'ui-icon-triangle-1-e', 'activeHeader': 'ui-icon-triangle-1-s' });
  });
  </script>

__________________

<tr>
          <td><div id="accordion">
            <h3 class="ui-accordion-header">Prevent Unemployment Insurance Fraud</h3><div>
              <p class="ui-accordion-content"><span class="text-fraud-BlackBold-Title">Did you know...</span><br /><br />
                Example text<p><td>
</tr>

• Topic Participants

• pat.cotton

• kbwood.au

• lori.corkum

• jtara-jquery