/*

*基本思路,将字符串时间转化为时间对象,通过毫秒数来加减时间,然后在转化为字符串输出

*/        

              //转化字符时间yy-mm-dd hh:mm:ss 为时间对象   使用split进行字符串的分割,取值并创建新的时间对象
               var toDate = function(strDateTime){
                    var strDateTimes = strDateTime.split(‘ ‘);
                    var strDate = strDateTimes[0].split(‘-‘);
                    var year = Number(strDate[0]);
                    var month = Number(strDate[1]) - 1;
                    var day = Number(strDate[2]);
                    
                    var strTime = strDateTimes[1].split(‘:‘);
                    var hour = Number(strTime[0]);
                    var minute = Number(strTime[1]);
                    var secend = Number(strTime[2]);
                    return new Date(year, month, day, hour, minute, secend);
                }

            //转化为字符时间yy-mm-dd hh:mm:ss  通过时间对象的方法获取时分秒,使用字符串进行拼接返回字符串
            var toStrDate = function(objDate){
                var year = objDate.getFullYear();
                var month = objDate.getMonth()+1;
                var day = objDate.getDate();
                var hour = objDate.getHours();
                var minute = objDate.getMinutes();
                var second = objDate.getSeconds();
                if(month<10){
                    month = "0"+month;
                }
                if(day<10){
                    day = "0"+day;
                }
                if(hour<10){
                    hour = "0"+hour;
                }
                if(minute<10){
                    minute = "0"+minute;
                }
                if(second<10){
                    second = "0"+second;
                }
                return year+"-"+month+"-"+day+" "+hour+":"+minute+":"+second
            }
            /*添加时间

             *strTime为字符串时间格式yy-mm-dd hh:mm:ss   或  时间对象

             *如果未输入则默认为当前时间

             *addTime为秒数

             */

           var addDate = function(strTime,addTime){

               var addTime = Number(addTime)*1000;

               var newDate = new Date();

             //toDate

              if(typeof(strTime)=="object"){

               newDate = strTime;

               }else if(typeof(strTime)=="string"){

                 var strDateTimes = strTime.split(" ");//年月日

                    var strDate = strDateTimes[0].split("-");

　　　　　      var year = Number(strDate[0]);

　　　　　      var month = Number(strDate[1])-1;

                    var day = Number(strDate[2]);

                var strTime = strDateTimes[1].split(":");//时分秒

                    var hour = Number(strTime[0]);

                    var minute = Number(strTime[1]);

                    var second = Number(strTime[2]);

               newDate = new Date(year,month,day,hour,minute,second);

                }else{

                  alert("输入的格式不正确")

                }

               //添加时间

                var addDate = newDate+addTime;

                //toStr

                     var new_year = addDate.getFullYear();

                     var new_month = addDate.getMonth()+1;

                     var new_day = addDate.getDate();

                     var new_hour = addDate.getHours();

                     var new_minute = addDate.getMinutes();

                     var new_seconds = addDate.getSeconds();

                     if(new_year<10){

                      new_year = "0"+new_year;

                        };

                    if(new_month<10){

                        new_month = "0"+new_month;

                        };

                      if(new_day<10){

                        new_day = "0"+new_day;

                        };

                      if(new_hour<10){

                        new_hour = "0"+new_hour;

                        };

                      if(new_minute<10){

                         new_minute = "0"+new_minute;

                        };

                      if(new_second<10){

                         new_second = "0"+new_second;

                        };

                return  new_year+"年"+"-"+new_month+"月"+"-"+new_day+"日"+" "+new_hour+"时"+":"+new_minute+"分"+":"+new_second+"秒"
            };