微信内嵌H5网页 解决js倒计时失效

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<script type="text/javascript"><br>  var timespan = ‘20160113‘;    //后台程序生成24小时时间差值，这里随便写写

        var timer;

        function UpdateTime() {

            if (timespan > 0) {

                var hour = Math.floor(timespan / (60 * 60));

                var minute = Math.floor((timespan - (hour * 60 * 60)) / 60);

                var second = (timespan - (hour * 60 * 60) - (minute * 60));

                var word = "支付剩余时间" + (hour<10?("0"+hour):hour) + "：" + (minute<10?("0"+minute):minute)  + "：" + (second<10?("0"+second):second)  + "，逾期订单将自动取消~";

                timespan--;

                jQuery(".tc").html("<i class=‘time‘></i>" + word);

                timer = setTimeout("UpdateTime()", 1000);

            }

            else {

                $(‘.content‘).find(‘.w_op‘).hide();

                clearTimeout(timer);

                jQuery(".tc").html("<i class=‘time‘></i>" +  "订单过期，已自动取消~");

                window.location.href=‘@Url.Action("orderDetail", "Order", new { OrderNumber = Model.No })‘;;   //订单过期，跳转到订单详情页

            }

        }

        jQuery(document).ready(function () {

            UpdateTime();

        });<br></script>

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<meta http-equiv="pragma" content="no-cache"> 

<meta http-equiv="cache-control" content="no-cache"> 

<meta http-equiv="expires" content="0">