someJs

/*
 * This bit of JS prints a "you are now logging into:
 * $hostname" blurb on the page and eliminates duplicate login
 * button that sometimes shows up
 */

let duplicateLogin, uParam;

// Ancient browsers don't support URLSearchParams() method
try {
    // Get the 'u' parameter, strip the path
    uParam = new URLSearchParams(window.location.search)
        .get('u')
        .replace(/(https?:\/\/[a-zA-Z0-9\-\._]{1,63})\/.*/, "$1");
} catch (error) {
    console.log(error);
}

// Send it
if (uParam) {
    document
        .getElementById("uParam")
        .textContent = 'You are now logging into: ' + uParam;
}

// Get the duplicate login button
duplicateLogin = document.getElementById("login");
// Hide duplicate login button
if (duplicateLogin) duplicateLogin.style.display = "none";