[JS] Redirect to previous page

redirect_back.js

/**
 * Redirect to previous page
 *
 * @returns {boolean}
 */
function redirect_back() {
    // From other domain or from direct
    if (document.referrer.split('/')[2] != location.hostname) {
        location.href = '/';
    } else {
        // From another page in our site
        window.history.back();
    }
    return false;
}