container.innerHTML = (''
         + '<a href="javascript:goto_root_of(' + id + ')" class="root_link">r</a>'
         + ' '
         + '<a href="javascript:goto_parent_of(' + id + ')" class="parent_link">p</a>'
         + '&nbsp;&nbsp;'
      );

//      anch.parentNode.insertBefore(container, anch.nextSibling);
      anch.parentNode.insertBefore(container, anch);