Kartra Mark Current Page Navigation

<script>
/*
 * Adds class "current_page" to navigation links for current Kartra page.
 * Place code in Kartra FOOTER tracking.
 * Author: Brian Katzung <briank@kappacs.com>
 */
jQuery(function () {
    var base = location.toString().replace(/[?#].*/, '');
    jQuery('ul.nav a').each(function () {
    var m = this.href.match(/^(.*?)([?#].*)?$/);
    if (m && (m[1] === base || (m[2] && m[2].indexOf('asset=page') > 0 && m[2].indexOf('id=' + window.global_id) > 0))) $(this).parent().addClass('current_page');
    });
});
</script>