Javascript를 사용하여 n일 전 날짜를 얻는 방법_javascript 팁

复aze代码 代码如下:

 function Test(day) {
                var today = new Date( );
                var beforMilliseconds = today.getTime() - 1000 * 3600 * 24 * day;
               var beforday = new Date();
              s);
                var strYear = beforday .getFullYear();
                var strDay = beforday.getDate();
               var strMonth = beforday.getMonth() 1;
               if (strMonth                     strMonth = "0" strMonth > 🎜>