[noname122]

Я уже нашла такой метод но как реализовать его под мой код не понимаю,поможете?

function Go(Form){
    var text = [4];
    text[0] = document.getElementById("1");
    text[1] = document.getElementById("2");
    text[2] = document.getElementById("3");
    text[3] = document.getElementById("4");
    var mt = [4];
    for (let i = 0; i < 4; i++){mt[i] = false}
    if(Form.tl.value != ""){
        let n = 0;
        for (let i = 0; i < Form.tl.value.length; i++){
            if(Form.tl.value[i] >= 'a' && Form.tl.value[i] <= 'z'){n++}else{n = 0; break;}
        }
        if(n >= 4 && n <= 8){
            mt[0] = true;
        }
    }
    if(Form.te.value != ""){
        let i = 0, n = 0;
        for (; i < Form.te.value.length && Form.te.value[i] != '@'; i++){
            if(Form.te.value[i] >= 'A' && Form.te.value[i] <= 'Z' || Form.te.value[i] >= 'a' && Form.te.value[i] <= 'z' || Form.te.value[i] >= '0' && Form.te.value[i] <= '9' || Form.te.value[i] == '.' && n != 0 && Form.te.value[i+1] != '@'){n++}
            else {n = 0; break;}
        }
        if(n >= 2){
            n = 0;
            i++;
            for (; i < Form.te.value.length && Form.te.value[i] != '.'; i++){
                if(Form.te.value[i] >= 'a' && Form.te.value[i] <= 'z'){n++}
                else {n = 0; break;}
            }
            if(n >= 1){
                i++;
                let str = "";
                for (; i < Form.te.value.length; i++){
                    str += Form.te.value[i];
                }
                if(str == 'ua' || str == 'com' || str == 'ru' || str == 'ch' || str == 'cz' || str == 'net' || str == 'edu.ua'){mt[1] = true}
            }
    }
    }
    if(Form.tp1.value != ""){
        let n = 0;
        let n1 = 0;
        let n2 = 0;
        for (let i = 0; i < Form.tp1.value.length; i++){
            if(Form.tp1.value[i] >= 'A' && Form.tp1.value[i] <= 'Z'){n++}
            if(Form.tp1.value[i] >= 'a' && Form.tp1.value[i] <= 'z'){n1++}
            if(Form.tp1.value[i] >= '0' && Form.tp1.value[i] <= '9' ){n2++}
        }
        let n3 = Form.tp1.value.length - n - n1 - n2;
        if(n >= 1 && n1 >= 1 && n2 >= 1 && n3 >= 1 && Form.tp1.value.length >= 8){mt[2] = true}
    }
    if(Form.tp2.value == Form.tp1.value && Form.tp2.value != ""){mt[3] = true}
    let m = 0;
    for (let i = 0; i < 4; i++){
        if(mt[i] == false){
            text[i].style.color = 'red';
        }
        else { text[i].style.color = 'rgb(132, 170, 221)'; m++}
    }
    t = document.getElementById("t");
    if(m == 4){
        t.innerHTML = "регистрация прошла успешно";
    }
    else{t.innerHTML = "";}
}