计算日期相隔天数/根据天数差计算结束日期

//计算两个日期相差的天数
  function DateDiff() {
    var sDate=$("input[name=\'daterangepicker_start\']").val(),
        eDate=$("input[name=\'daterangepicker_end\']").val(),
        iDays,sDate1,eDate1,startDate, endDate;
        sDate1 = sDate.split("/");
        startDate = new Date(sDate1[1] + \'/\' + sDate1[2] + \'/\' + sDate1[0]).getTime();
        //转换为dd-MM-yyyy格式并转换为毫秒
        eDate1 = eDate.split("/");
        endDate = new Date(eDate1[1] + \'/\' + eDate1[2] + \'/\' + eDate1[0]).getTime();
        iDays = parseInt(Math.abs(endDate - startDate) / 1000 / 60 / 60 / 24);
        //把相差的毫秒数转换为天数
        return iDays;  //返回相差天数

}
//时间间隔计算结束日期
    function DateDiff01() {
        var sDate=$("#stedDate").val().substring(0,10),
            inputDay=$(\'#difDay\').val(),
            inputDays,sDate1,startDate;
        sDate1 = sDate.split("/");
        startDate = new Date(sDate1[1] + \'/\' + sDate1[2] + \'/\' + sDate1[0]).getTime();
        inputDays = (startDate+(inputDay*1000*60*60*24));
        //console.log(sDate);
        var newTime = new Date(inputDays); //得到普通的时间
        var newYear =newTime.getFullYear();
        var newMonth =newTime.getMonth()+1;
        var newDay =newTime.getDate();
        var newDate =newYear + \'/\' + newMonth+ \'/\' + newDay;
        var farmate =sDate + " - " + newDate;
        var eDate=$("input[name=\'daterangepicker_end\']").val(newDate);
        $("#stedDate").val(farmate);
        console.log(farmate);
    }