js checkbox获取选中的值

 //将选择标签
        var addCode = function () {
            var codes = [];
            var elements = document.getElementsByName("label");
            for (var i = 0; i < elements.length; i++) {
                if (elements[i].checked == true) {
                    var temp = elements[i].getAttribute("value");
                    codes.push(temp);
                }
            }
            return codes;
        };