$(function () {
        $(‘.pricing-box‘).click(function () {
            $(this).addClass("select").siblings().removeClass("select");
        })
        $(".agree-choose input[type=‘checkbox‘]").change(function () {

            if ($(this).is(‘:checked‘)) {
                $("#submit-btn").removeClass("disabled");
            } else {
                $("#submit-btn").addClass("disabled");
            }

        })
    })

<div class="agree-service-wrap">
                <input type="checkbox" name="enableDiscount" class="price-factor hide">
                <div class="agree-choose pull-right checkbox">
                    <label>
                        <input id="agree-choose" name="agree-choose" type="checkbox" class="ace">
                        <span class="lbl"> <span class="agree-use">我已阅读并同意签署</span><a href="" target="_blank">《服务协议》</a></span>
                    </label>
                </div>
            </div>

<footer class="order-price  pull-right"><input type="hidden" name="costTotal" class="cost-total" value="0">
 　　<div class="price-total">
   　　<span class="price-label">总计：</span><span class="price">￥ 2490</span>
 　　  　　<p>购买后店铺可容纳10个成员</p>
　　　　   <p> 到期时间为2018年5月22日</p>
　　 </div>
　　<div class="order-submit"><a id="submit-btn" href="payment-order.html" type="button" class="btn btn-primary disabled btn-round">提交订单</a></div>
 </footer>