php - Ajax code doesn't bring me to the right page

one text

Solution:

The answer to this question was to add trim.

function auth() {
    email = document.getElementById("email").value;
    pass = document.getElementById("password").value;
    sendGetRequest("login.php", {email: email, password: pass}, function callback(r) {
        if (r.trim() == "loggedin") {
            location.href = 'index.php';
        } else {
            alert(r);
        }
    });
}