如何在onclick上将插入符号方向更改为up

Question

您好我在点击链接时尝试更改插入方向，这是我的jsfiddle：https://jsfiddle.net/Swathi56/5ak9uhzp/

HTML

<nav>
  <dl>
    <dt class="qp-ui goog-zippy-header goog-zippy-expanded" data-qp-ui="{ 'SideNavZippy': false }" tabindex="0" role="tab" aria-expanded="true" data-qp-ui-data-id="qp:6">Desktop</dt>
    <div style="overflow: hidden;">
    <dt class="nested-group qp-ui goog-zippy-header goog-zippy-expanded" data-qp-ui="{ 'SideNavZippy': false }" tabindex="0" role="tab" aria-expanded="true" data-qp-ui-data-id="qp:7">Hysys<b class="caret"></b></dt>
      <dd>
        <a href="hysys.html">Hysys</a>
      </dd>
    </div>
   </dl>