Customize Book Now Button Image
The default Book Now button looks like this.
To customize the Book Now button, add the buttonImageUrl parameter to the Book Now script code.
<script type='text/javascript'> document.write(unescape("%3Cscript src='https://jasminepm.com/assets/jz_appt_widget_iframe.js?orgId=XXXXXXXX&buttonImageUrl=http://www.phuquocvietnam.net/wp-content/uploads/2015/07/Book-Now-button-red-0102-md.jpg' type='text/javascript'%3E%3C/script%3E")); </script>