序列化问题

serialize()对于未选中的checkbox,radio是获取不到值得。

$.fn.all_serialize = function () {
        var a = this.serializeArray();
        var $radio = $('input[type=radio],input[type=checkbox]', this);
        var temp = {};
        $.each($radio, function () {
            if (!temp.hasOwnProperty(this.name)) {
                if ($("input[name='" + this.name + "']:checked").length == 0) {
                    temp[this.name] = "";
                    a.push({name: this.name, value:0});
                }
            }
        });
            return a;
    };
    $("#form_id").all_serialize();