Kartra Account Domain Redirect To Custom Domain

/*
 * Redirect to custom domain page via Kartra account domain page:
 * Set the page redirect to the desired custom domain page and add this
 * at the top of the HEAD section of the Kartra account domain page.
 * Any parameters will be protectively encoded with kartraEscapeQuery.
 */
function kartraEscapeQuery (qs) {
return '?$=' + encodeURIComponent(encodeURIComponent('&' + qs)) + '&' + qs;
}
var red = document.querySelector('meta[data-redirect]');
if (red && location.search.length > 1) {
red.remove();
var info = JSON.parse(red.dataset.redirect).custom;
location = info.protocol + info.url + kartraEscapeQuery(location.search.substring(1));
}