title: Paypal JavaScript SDK with IPN
body: <p>I am using PayPal JavaScript SDK. Now I want to add Instant Payment Notification (IPN) as I have done with just the quick checkout button.
  There I have used it in a form with POST like this:</p>
  <pre><code>&lt;form action=&quot;https://www.paypal.com/cgi-bin/webscr&quot; method=&quot;post&quot;&gt;
  &lt;input type=&quot;hidden&quot; name=&quot;notify_url&quot; value=&quot;&lt;?php echo $HTTP_DIR.&quot;method/paypal/ipn.php&quot;; ?&gt;&quot;&gt;
  </code></pre>
  <p>How I can use &quot;notify_url&quot; with the JS SDK? I did not find it as a parameter.</p>
  <p>Is it enough to set up in the PayPal account where I can set an IPN URL?</p>