If you are using as your website builder and wish to use the QuickShop Hosted Checkout Solution for your online payments, you will need to paste HTML code into an iFrame that Wix provides. Be sure to change the <form> tag to include a popup functionality.
<form method="post" action="https://www.payjunction.com/trinity/quickshop/add_to_cart.action">
<form method="post" target="_blank" action="https://www.payjunction.com/trinity/quickshop/add_to_cart.action">
Note: target = "_blank" has been added to the form tag.