jquery仿淘宝商品尺寸价格选择

    //价格json
    var sys_item = {
        "mktprice": "13.00",
        "price": "6.80",
        "sys_attrprice": { "3_13": { "price": "6.80", "mktprice": "13.00" }, "3_14": { "price": "7.80", "mktprice": "14.00" }, "3_16": { "price": "8.80", "mktprice": "15.00" }, "3_17": { "price": "9.80", "mktprice": "16.00" }, "4_13": { "price": "6.80", "mktprice": "13.00" }, "4_14": { "price": "7.80", "mktprice": "14.00" }, "4_16": { "price": "8.80", "mktprice": "15.00" }, "4_17": { "price": "9.80", "mktprice": "16.00" }, "8_13": { "price": "6.80", "mktprice": "13.00" }, "8_14": { "price": "7.80", "mktprice": "1400" }, "8_16": { "price": "8.80", "mktprice": "15.00" }, "8_17": { "price": "9.80", "mktprice": "16.00" }, "9_13": { "price": "6.80", "mktprice": "13.00" }, "9_14": { "price": "7.80", "mktprice": "14.00" }, "9_16": { "price": "8.80", "mktprice": "15.00" }, "9_17": { "price": "9.80", "mktprice": "16.00" }, "10_13": { "price": "6.80", "mktprice": "13.00" }, "10_14": { "price": "7.80", "mktprice": "14.00" }, "10_16": { "price": "8.80", "mktprice": "15.00" }, "10_17": { "price": "9.80", "mktprice": "16.00" }, "12_13": { "price": "6.80", "mktprice": "13.00" }, "12_14": { "price": "7.80", "mktprice": "14.00" }, "12_16": { "price": "8.80", "mktprice": "15.00" }, "12_17": { "price": "9.80", "mktprice": "16.00"}}
    };

    //商品规格选择
    $(function () {
        $(".sys_item_spec .sys_item_specpara").each(function () {
            var i = $(this);
            var p = i.find("ul>li");
            p.click(function () {
                if (!!$(this).hasClass("selected")) {
                    $(this).removeClass("selected");
                    i.removeAttr("data-attrval");
                } else {
                    $(this).addClass("selected").siblings("li").removeClass("selected");
                    i.attr("data-attrval", $(this).attr("data-aid"))
                }
                getattrprice() //输出价格
            })
        })

        //获取对应属性的价格
        function getattrprice() {
            var defaultstats = true;
            var _val = '';
            var _resp = {
                mktprice: ".sys_item_mktprice",
                price: ".sys_item_price"
            }  //输出对应的class
            $(".sys_item_spec .sys_item_specpara").each(function () {
                var i = $(this);
                var v = i.attr("data-attrval");
                if (!v) {
                    defaultstats = false;
                } else {
                    _val += _val != "" ? "_" : "";
                    _val += v;
                }
            })
            if (!!defaultstats) {
                _mktprice = sys_item['sys_attrprice'][_val]['mktprice'];
                _price = sys_item['sys_attrprice'][_val]['price'];
            } else {
                _mktprice = sys_item['mktprice'];
                _price = sys_item['price'];
            }
            //输出价格
            $(_resp.mktprice).text(_mktprice);  ///其中的math.round为截取小数点位数
            $(_resp.price).text(_price);
        }
    })