<script> jQuery(document).ready( () => { function getUrlParameter(name, url) { if (!url) { url = window.location.href; } name = name.replace(/[\[]/, '\\[').replace(/[\]]/, '\\]'); var regex = new RegExp('[\\?&]' + name + '=([^&#]*)'); var results = regex.exec(url); return results === null ? '' : decodeURIComponent(results[1].replace(/\+/g, ' ')); } var coach = getUrlParameter('coachvar'); jQuery("[name='coach_field'").val(coach); }); </script>