+1 Button

I found this +1 button at Google Webmasters. It will display a custom button on your web page that allows visitors to register their approval.

<!-- Place this tag where you want the +1 button to render -->
<g:plusone></g:plusone>

<!-- Place this render call where appropriate -->
<script type="text/javascript">
  (function() {
    var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true;
    po.src = 'https://apis.google.com/js/plusone.js';
    var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s);
  })();
</script>