Realtime-Facebook-Update.html

<!-- The JavaScript will replace the content between this span.
Add place holder number if they are stable in number. -->
<span class="fb-likes-count"></span>

Realtime-Facebook-Update.js

<script> 
  jQuery(document).ready(function() {
    // Fetch Facebook Likes once and every 30 seconds thereafter
    // Adjust setInterval to either fetch content in different frequency or remove to only fetch once.
    realtime_fb_likes();
    setInterval("realtime_fb_likes()", 30000);
  });
 
  // Fetch FB Likes
  // Replace "YOUR-FB-ID-OR-WEBSITE-ADDRESS" with your Facebook Profile/Page ID, or full external website address.
  // Get FB ID here:  http://graph.facebook.com/your_page_name
  function realtime_fb_likes() {
    $.getJSON('http://graph.facebook.com/YOUR-FB-ID-OR-WEBSITE-ADDRESS/', function(data) {
      var fb_likes = addCommas(data.likes);
      $('.fb-likes-count').text(fb_likes);
    });
  }
 
  // Pretty number format to add commas between numbers
  // Source: http://www.mredkj.com/javascript/nfbasic.html
  function addCommas(nStr) {
    nStr += '';
    x = nStr.split('.');
    x1 = x[0];
    x2 = x.length > 1 ? '.' + x[1] : '';
    var rgx = /(\d+)(\d{3})/;
    while (rgx.test(x1)) {
      x1 = x1.replace(rgx, '$1' + ',' + '$2');
    }
    return x1 + x2;
  }
</script>