<input type="hidden" value="@(Model.TimeLength)" id="examTimeLength" />                    <input type="hidden" value="@ViewData["ExamId"]" id="_ControlerId" />                    <span id="@ViewData["ExamId"]" class="fas_time"></span>                    <a class="fas_submit" id="submitExam" href="#" style="display: none">我要交卷</a>

 function timer() {        var time = $("#examTimeLength").val();        var Timer = {            controleId: $("#_ControlerId").val(),            cookieName: $("#_ControlerId").val(),            iTotalTime: null,            timerId: null,            init: function () {                this.remainTime();            },            addZero: function (num) {                var str = num < 10 ? Number(num) <= 0 ? ‘00‘ : ‘0‘ + num : num + ‘‘;                return str;            },            remainTime: function () {                var _this = this,                    oSpan = document.getElementById(_this.controleId);                _this.timerId = setInterval(function () {                    _this.iTotalTime = time;                    if (_this.iTotalTime <= 0) {                        clearInterval(_this.timerId);                        var functionName = "submitAnswer";                        if (functionName) {                            eval(functionName + "()");                        }                        return;                    }                    _this.iTotalTime--;                    time--;                    var hours = _this.addZero(Math.floor(_this.iTotalTime / 3600));                    var minutes = _this.addZero(Math.floor((_this.iTotalTime - hours * 3600) / 60));                    var secs = _this.addZero(Math.floor(_this.iTotalTime % 60));                    var str = ‘{h}:{m}:{s}‘;                    str = str.replace(‘{h}‘, hours);                    str = str.replace(‘{m}‘, minutes);                    str = str.replace(‘{s}‘, secs);                    oSpan.innerHTML = str;                }, 1000);            }        };        Timer.init();    }