JavaScript实现时间范围效果

//rangeVal:两个日期的间隔符 num：隔多少 timeType：相隔时间类型
function funGetRangeDateByLess(rangeVal,num,timeType){
    var returnVal="";
    var otherVal="";
    var otherTime="";
    var curTime = new Date();
    var curTimeVal= curTime.getFullYear() + '-' + PrefixZero((curTime.getMonth() + 1), 2) + '-' + PrefixZero(curTime.getDate(), 2);
    switch (timeType) {
        case 1://分
            var addMinutes = curTime.setMinutes(curTime.getMinutes() - num);
            otherTime=new Date(addMinutes);
            break;
        case 2://时
            var addMinutes = curTime.setHours(curTime.getHours() - num);
            otherTime=new Date(addMinutes);
            break;
        case 3://天
            var aDDDate = curTime.setDate(curTime.getDate() - num);
            otherTime=new Date(addDate);
            break;
        case 4://月
            var addMonth = curTime.setMonth(curTime.getMonth() - num);
            otherTime=new Date(addMonth);
            break;
        case 5://年
            var addYear = curTime.setFullYear(curTime.getFullYear() - num);
            otherTime=new Date(addYear);
            break;
        default:
            break;
    }
    otherVal= otherTime.getFullYear() + '-' + PrefixZero((otherTime.getMonth() + 1), 2) + '-' + PrefixZero(otherTime.getDate(), 2);
    return returnVal=otherVal+rangeVal+curTimeVal;
}


function PrefixZero(num, n) {
    return (Array(n).join(0) + num).slice(-n);
}

var fillhelptime=funGetRangeDateByLess(" , ",6,4);
laydate.render({
        elem: "#fillhelptime",
        range: ",",
        type: 'date',
        value:fillhelptime,//默认值
});

//rangeVal:两个日期的间隔符 date：某个日期 beforeDays：前N天 afterDays：后N天
function funGetRangeDateByBeforeAndAfter(rangeVal,date,beforeDays,afterDays){
    var dateVaule1 = new Date(date);//转换成时间格式
    var dateVaule2 = new Date(date);//转换成时间格式
    var startDate = new Date(dateVaule1.setDate(dateVaule1.getDate() - beforeDays));//前N天
    var endDate = new Date(dateVaule2.setDate(dateVaule2.getDate() + afterDays));//后N天
    var date1= startDate.getFullYear() + '-' + PrefixZero((startDate.getMonth() + 1), 2) + '-' + PrefixZero(startDate.getDate(), 2);
    var date2= endDate.getFullYear() + '-' + PrefixZero((endDate.getMonth() + 1), 2) + '-' + PrefixZero(endDate.getDate(), 2);
    var returnVal=date1+rangeVal+date2;
    return returnVal;
}


function PrefixZero(num, n) {
    return (Array(n).join(0) + num).slice(-n);
}

//rangeVal:两个日期的间隔符 timeType：相隔时间类型 date：某个日期 beforeDays：前N天 afterDays：后N天
function funGetRangeDateByBeforeAndAfter(rangeVal,timeType,date,beforeNum,afterNum){
    var dateVaule1 = new Date(date);//转换成时间格式
    var dateVaule2 = new Date(date);//转换成时间格式
    var startDate = "";
    var endDate = "";
    switch (timeType) {
        case 1://分
            startDate = new Date(dateVaule1.setMinutes(dateVaule1.getMinutes() - beforeNum));//前N分钟
            endDate = new Date(dateVaule2.setMinutes(dateVaule2.getMinutes() + afterNum));//后N分钟
            break;
        case 2://时
            startDate = new Date(dateVaule1.setHours(dateVaule1.getHours() - beforeNum));//前N小时
            endDate = new Date(dateVaule2.setHours(dateVaule2.getHours() + afterNum));//后N小时
            break;
        case 3://天
            startDate = new Date(dateVaule1.setDate(dateVaule1.getDate() - beforeNum));//前N天
            endDate = new Date(dateVaule2.setDate(dateVaule2.getDate() + afterNum));//后N天
            break;
        case 4://月
            startDate = new Date(dateVaule1.setMonth(dateVaule1.getMonth() - beforeNum));//前N月
            endDate = new Date(dateVaule2.setMonth(dateVaule2.getMonth() + afterNum));//后N月
            break;
        case 5://年
          startDate = new Date(dateVaule1.setFullYear(dateVaule1.getFullYear() - beforeNum));//前N年
            endDate = new Date(dateVaule2.setFullYear(dateVaule2.getFullYear() + afterNum));//后N年
            var addYear = curTime.setFullYear(curTime.getFullYear() - num);
            break;
        default:
            break;
    }
    var returnVal1= startDate.getFullYear() + '-' + PrefixZero((startDate.getMonth() + 1), 2) + '-' + PrefixZero(startDate.getDate(), 2);
    var returnVal2= endDate.getFullYear() + '-' + PrefixZero((endDate.getMonth() + 1), 2) + '-' + PrefixZero(endDate.getDate(), 2);
    var returnVal=returnVal1+rangeVal+returnVal2;
    return returnVal;
}


function PrefixZero(num, n) {
    return (Array(n).join(0) + num).slice(-n);
}