title: IE issues with PayPal In-Context Express Checkout
body: <p>I'm implementing PayPal's In-Context flow for Express Checkout as specified in the documentation. Everything works as expected in Firefox, Chrome, and Opera. IE, however, gives me some issues.</p>
  
  <p>When I click the "Checkout with PayPal" image, the page goes dark and the modal window opens above it to PayPal's login/signup page as it should. But just before the page loads in the modal window, the page behind it turns white again, allowing users to interact with it which it shouldn't. I'm still able to go through with logging in and things in the modal window, yet the page behind it is active.</p>
  
  <p>The second issue deals with redirecting. In IE, the modal window NEVER disappears after clicking the "Continue" button, which redirects to a specified url on my server. The redirect happens alright; it just doesn't happen in the main window as it should but instead happens in the modal window. Simply put, everything that occurs after pressing the "Continue" button happens in the modal window with no more interaction with the main window.</p>
  
  <p>Again, everything works in other browsers (I've yet to test things in Safari), but IE (v.11) isn't behaving correctly. Can someone point me in the right direction?</p>
  
  <p>Thanks</p>