title: AJAX return data fade into existing elements
body: <p>On my website I have an update form that when submitted alters my database. 
  What I want to do however is have all the elements that contain the old values, </p>
  
  <p><em><strong>AJAX</em></strong></p>
  
  <pre><code>// UPDATE 
       $(".bill-upd-submit").click(function() {
            var elem = $(this);
            $.post("update_bill.php", elem.parent(".bill-upd").serialize(), function(data) {
               //INSERT INTO OLD VALUES
            });
      });
  </code></pre>
  
  <p><em><strong>PHP</em></strong></p>
  
  <p>In my PHP I've tried the following with no luck, has anybody done this before or can give me advice on where I may be going wrong?</p>
  
  <pre><code> echo "elem.closest('li').find('.cost').html('');";
  </code></pre>