var name, password, password2, nameRegExp, passRegExp, error;
    name = document.getElementById("username");
    password = document.getElementById("password");
    password2 = document.getElementById("password-2");
    error = document.getElementById('test-error');

    nameRegExp = /^[a-zA-Z0-9]{3,10}$/;
    passRegExp = /^.{6,20}$/;

    if(!nameRegExp.test(name.value)){
       error.innerHTML = "用户名不正确!";
       return false;
    }
    if(!passRegExp.test(password.value) || !passRegExp.test(password2.value)){
        error.innerHTML = "密码不正确!";
        return false;
    }
    if (password2.value !== password.value) {
        error.innerHTML = "两次输入密码不一致！";
        return false;
    }
    return true;
}