title: jQuery - do something once AJAX complete
body: <p>I have a simple POST AJAX call - once this has complete I want to run a custom function - I tried .success() without any joy - can someone help me out?</p>
  
  <pre><code>jQuery.post('http://www.site.com/product/123/', jQuery('#product_addtocart_form').serialize(), function() 
     // on success - do something here
  });
  </code></pre>