<script>
function checkcode(url){
        var xhr = new XMLHttpRequest();
        xhr.open('GET', url, false);
        try{xhr.send();return xhr.status()}
        catch{return null;}
function gproto(url){
        if (checkcode("https://"+a) == 200)){window.location.href = "https://"+a;}
        else if (checkcode("http://"+a == 200)){window.location.href = "http://"+a;}
        else {window.location.href = "https://"+a;}//Могут быть иной возврат, 400, 403, возвращаем стандартный протокол

function Reloc(a)
{
    if (a.substr(0,6) != "http://" || a.substr(0,6) != "https://"){gproto(a);}
    else {window.location.href = a;}
}
</script>