REST API

Invoking the Iframe

Add JavaScript to invoke the iframe form POST. Place the JavaScript after the closing </body> tag as shown in the example below. The JavaScript invokes the iframe form POST automatically when the window loads. While you can submit the form at a different time, you must submit the form before requesting the validation service.
<script> window.onload = function() { var stepUpForm = document.querySelector('#step-up-form'); if(stepUpForm) // Step-Up form exists stepUpForm.submit(); } </script>