function getDay(day){         var today = new Date();                  var targetday_milliseconds=today.getTime() + 1000*60*60*24*day;                   today.setTime(targetday_milliseconds);                 var tYear = today.getFullYear();         var tMonth = today.getMonth();         var tDate = today.getDate();         tMonth = doHandleMonth(tMonth + 1);         tDate = doHandleMonth(tDate);         return tYear+"-"+tMonth+"-"+tDate;  }  function doHandleMonth(month){         var m = month;         if(month.toString().length == 1){            m = "0" + month;         }         return m;  }      $("#today").text(getDay(0));    $("#tomorrow").text(getDay(1));    $("#houtian").text(getDay(2));  console.log("半年前："+getDay(-180));console.log("三月前："+getDay(-90));console.log("一月前："+getDay(-30));console.log("昨天："+getDay(-1));console.log("今天："+getDay(0));console.log("明天："+getDay(1));console.log("后天："+getDay(2));console.log("一月后："+getDay(30));console.log("三月后："+getDay(90));console.log("半年后："+getDay(180));