js 獲取當前時間前幾分鍾

function getNowFormatDate() {
            var date = new Date();
            var seperator1 = "-";
            var seperator2 = ":";
            //前十分鍾時間
             var minutes=parseInt("10");  

          var   interTimes=minutes*60*1000;

          var interTimes=parseInt(interTimes);  
             date=new   Date(Date.parse(date)-interTimes);
            
            var month = date.getMonth() + 1;
            var strDate = date.getDate();
            var hour = date.getHours();
            var minutes = date.getMinutes();
            if (month >= 1 && month <= 9) {
                month = "0" + month;
            }
            if (strDate >= 0 && strDate <= 9) {
                strDate = "0" + strDate;
            }
            if (hour >= 0 && hour <= 9) {
                    hour = "0" + hour;
            }
            if (minutes >= 0 && minutes <= 9) {
                    minutes = "0" + minutes;
            }
            var currentdate = date.getFullYear() + seperator1 + month + seperator1 + strDate
                    + " " + hour + seperator2 + minutes
                    + seperator2 + date.getSeconds();
            return currentdate;
        }