Как ставить баннер html5?

<a href="/company/[xfvalue_company]/" id="xfield_value">[xfvalue_company]</a>

<script>
document.addEventListener('DOMContentLoaded', function() {
    const links = document.querySelectorAll('a#xfield_value');

    links.forEach(link => {
      let href = link.getAttribute('href');

      if (href) {
        href = href.replace(/ /g, '+');
        link.setAttribute('href', href);
      }
    });
  });
</script>