解析并使用别人已经做好的C#WEB倒计时（正在使用，适合我这样的新手）

 

 

 var SysSecond;
        var InterValObj;

        $(document).ready(function () {
            SysSecond = parseInt($("#lblTime").html()) * 60; //这里获取倒计时的起始时间
            InterValObj = window.setInterval(SetRemainTime, 1000); //间隔函数，1秒执行

        });

        //将时间减去1秒，计算天、时、分、秒
        function SetRemainTime() {
            if (SysSecond > 0) {
                SysSecond = SysSecond - 1;
                var second = Math.floor(SysSecond % 60);             // 计算秒    
                var minite = Math.floor((SysSecond / 60) % 60);      //计算分
                var hour = Math.floor((SysSecond / 3600) % 24);      //计算小时
                //        var day = Math.floor((SysSecond / 3600) / 24);        //计算天
                //当时间为0时提交答案
                if (second == 0 & minite == 0 & hour == 0) {
                    // alert("56");
                    var str1 = "";  //答案
                    //循环题号
                    for (var i = 1; i < $(":checkbox").length / 4; i++) {
                        //判断应试者有没选择
                        if ($("#lbl" + i).text() != "") {
                            str1 += i + "." + $("#lbl" + i).text() + "."; //拼接答案
                        } else {
                            // 如果没有选就用“无”代替
                            str1 += i + ".无.";
                        }

                    }
                    $.ajax({
                        type: "POST",
                        url: "Exam.aspx/GetAnswer",
                        data: "{'str':'" + str1 + "','str1':'" + $("#lblId").text() + "'}",
                        contentType: "application/json; charset=utf-8",
                        dataType: "json",
                        success: function Success(data) {
                            //                printEmployeeCars();
                            alert(data.d);
                            window.location.href = "KaoShi.aspx";
                        }
            ,
                        error: function (err) {
                            alert(err);
                        }

                    }); return false;

                }
                //        if (minite == 5) {
                //            alert(");
                //        }

                $("#lblUserTime").html(hour + ":" + minite + ":" + second);

            } else {//剩余时间小于或等于0的时候，就停止间隔函数
                window.clearInterval(InterValObj);
                //这里可以添加倒计时时间为0后需要执行的事件
            }

        }