Download e-Book: Panduan Penggunaan e-Bupot Unifikasi

function isValidUrl(str) { const pattern = new RegExp( '^([a-zA-Z]+:\\/\\/)?' + // protocol '((([a-z\\d]([a-z\\d-]*[a-z\\d])*)\\.)+[a-z]{2,}|' + // domain name '((\\d{1,3}\\.){3}\\d{1,3}))' + // OR ip (v4) address '(\\:\\d+)?(\\/[-a-z\\d%_.~+]*)*' + // port and path '(\\?[;&a-z\\d%_.~+=-]*)?' + // query string '(\\#[-a-z\\d_]*)?$', // fragment locator 'i' ); return pattern.test(str); } document.addEventListener('wpcf7submit', function (event) { if (isValidUrl(document.referrer)) { document.getElementById("contact_sales_source").value = document.referrer; } }, false);