Where in the product page do I put this bit of code?

[autoace]

I am trying to implement the Facebook 'Like' Button on my product info pages and believe I have everything in place except for one MINOR thing.... a bit confused on how to load the JavaScript SDK in my site?

I have been looking here on Facebook and it seems that the easiest way to do it is to put this bit of code:

<div id="fb-root"></div>
<script>
  window.fbAsyncInit = function() {
    FB.init({appId: 'your app id', status: true, cookie: true,
             xfbml: true});
  };
  (function() {
    var e = document.createElement('script'); e.async = true;
    e.src = document.location.protocol +
      '//connect.facebook.net/en_US/all.js';
    document.getElementById('fb-root').appendChild(e);
  }());
</script> 

in my page.

Where in the product page do I put this bit of code to load the SDK?