gistfile1.js

function openPaymentDialog(transactionId){
                console.log(transactionId);
                var airtime_form_div = document.createElement('div');
                airtime_form_div.setAttribute('id', 'airtime_form');

                var mdn_input_url = 'https://sandbox.codapayments.com/airtime/begin?host_url=' + encodeURIComponent(window.location) + '&txn_id=' + transactionId + '&client_type=1&client_time=' + new Date().getTime();
                //var mdn_input_url = 'https://sandbox.codapayments.com/airtime/begin?host_url=https://www.zeemi.tv&txn_id=' + transactionId + '&client_type=1&client_time=' + new Date().getTime();
                airtime_form_div.innerHTML = '<div><iframe id=\"airtime_iframe\" src=\"' + mdn_input_url + '\" scrolling=\"no\"></iframe></div>';

                var body_el = document.getElementsByTagName("body")[0];
                body_el.appendChild(airtime_form_div);
            }