JS计算两个时间差的问题

计算两个时间差的问题

function getDateIsMatching(){

        var pactbegindate=$("#loanbegindate").datetimebox("getValue");

        var pactenddate=$("#loanenddate").datetimebox("getValue");

        var loanterm=$("#loanterm").val();

        var loantermtype=$("#loantermtype").val();

        var loantermtypestr;

        //将日期字符串分隔为数组,数组元素分别为年.月.日

        var date1Str = pactbegindate.split("-");

        //根据年 . 月 . 日的值创建Date对象

        var date1Obj = new Date(date1Str[0],(date1Str[1]-1),date1Str[2]);

        //将日期字符串分隔为数组,数组元素分别为年.月.日

        var date2Str = pactenddate.split("-");

        //根据年 . 月 . 日的值创建Date对象

        var date2Obj = new Date(date2Str[0],(date2Str[1]-1),date2Str[2]);

        var year1 = date1Obj.getFullYear();

        var year2 = date2Obj.getFullYear();

        //相差的年数

        var differYears =year2-year1;

        var month1 = date1Obj.getMonth();

        var month2 = date2Obj.getMonth();

        //相差的月数

        var differMonths=differYears*12+(month2-month1);

        var day1=parseInt(date1Str[2]);

        var day2=parseInt(date2Str[2]);

        //相差的天数

        var differDays=day2-day1;

        if(null!=loantermtype&&loantermtype==1){

            loantermtypestr="年";

            if (loanterm!=differYears) {

                alert("起止日期相差的年数"+differYears+loantermtypestr+",合同期限:"+loanterm+loantermtypestr+",请确认起止日期是否正确!");

                return false;

            }

            if (month2!=month1) {

                alert("请检查起止日期的月份是否相等!");

                return false;

            }

            //大于等于就正确

            if (differDays<0) {

                alert("请检查起止日期的'天数'是否正确!");

                return false;

            }

            return true;

        }else if(null!=loantermtype&&loantermtype==2){

            loantermtypestr="个月";

            if (loanterm!=differMonths) {

                alert("起止日期相差的月数"+differMonths+loantermtypestr+",合同期限:"+loanterm+loantermtypestr+",请确认起止日期是否正确!");

                return false;

            }

            //大于等于就正确

            if (differDays<0) {

                alert("请检查起止日期的'天数'是否正确!");

                return false;

            }

            return true;

        }else{

            var t1 = date1Obj.getTime();

            var t2 = date2Obj.getTime();

            var dateTime = 1000*60*60*24; //每一天的毫秒数

            var minusDays = Math.floor(((t2-t1)/dateTime));//计算出两个日期的天数差

            var days = Math.abs(minusDays);//取绝对值

            loantermtypestr="天";

            if (loanterm!=days) {

                alert("起止日期相差的天数"+days+loantermtypestr+",合同期限:"+loanterm+loantermtypestr+",请确认起止日期是否正确!");

                return false;

            }

            return true;

        }

    }