(function () {
    var form = document.querySelector('form');
    if (!form) return;
    form.addEventListener('submit', function () {
        var checked = Array.from(document.querySelectorAll('input[name="PermissionsSelection"]:checked'));
        Array.from(form.querySelectorAll('input[name^="Permissions["]')).forEach(function (x) { x.remove(); });
        checked.forEach(function (el, i) {
            var input = document.createElement('input');
            input.type = 'hidden';
            input.name = 'Permissions[' + i + ']';
            input.value = el.value;
            form.appendChild(input);
        });
    });
})();