var request = new XMLHttpRequest()
        request.open('GET', url, true)

        request.onload = function () {
          if (request.status >= 200 && request.status < 400) {
                let nva = new Date().getTime() + 1_000
                window.location = url + "?nva="+nva
            } else {
                parent.location.hash = hash
                alert[0].style.display = 'block'
                password[0].setAttribute('placeholder', 'Incorrect password')
                password[0].value = ''
            }
        }
        request.onerror = function () {
            parent.location.hash = hash
            alert[0].style.display = 'block'
            password[0].setAttribute('placeholder', 'Incorrect password')
            password[0].value = ''
        }
        request.send()
    }