title: simpleCart.checkout() throws this.create is not a function
body: <p>I use simpleCart. I try start checkout process so I do </p>
  
  <pre><code>&lt;script&gt;
  $(document).ready(function(){
      simpleCart.checkout();
  })
  &lt;/script&gt;
  </code></pre>
  
  <p>but I get this.create is not a function Line: 1385. Any idea why that can happen? Here is link <a href="http://nmse.edge1.net/order-online" rel="nofollow">http://nmse.edge1.net/order-online</a></p>