function link_is_external(link_element) { return (link_element.host !== window.location.host); } $("article a").each(function(){ if (link_is_external(this)) { var prefix = "https://ebookeg.com/wp-content/plugins/deution-redirect/deution-url.php#"; var currentHref = $(this).attr("href"); $(this).attr("href",prefix+currentHref); } });