/* 
* 獲得時(shí)間差,時(shí)間格式為 年-月-日 小時(shí):分鐘:秒 或者 年/月/日 小時(shí)：分鐘：秒 
* 其中，年月日為全格式，例如 ： 2010-10-12 01:00:00 
* 返回精度為：秒，分，小時(shí)，天 
*/ 
function GetDateDiff(startTime, endTime, diffType) { 
//將xxxx-xx-xx的時(shí)間格式，轉(zhuǎn)換為 xxxx/xx/xx的格式 
startTime = startTime.replace(/\-/g, "/"); 
endTime = endTime.replace(/\-/g, "/"); 
//將計(jì)算間隔類性字符轉(zhuǎn)換為小寫 
diffType = diffType.toLowerCase(); 
var sTime = new Date(startTime); //開始時(shí)間 
var eTime = new Date(endTime); //結(jié)束時(shí)間 
//作為除數(shù)的數(shù)字 
var divNum = 1; 
switch (diffType) { 
case "second": 
divNum = 1000; 
break; 
case "minute": 
divNum = 1000 * 60; 
break; 
case "hour": 
divNum = 1000 * 3600; 
break; 
case "day": 
divNum = 1000 * 3600 * 24; 
break; 
default: 
break; 
} 
return parseInt((eTime.getTime() - sTime.getTime()) / parseInt(divNum)); 
}

調(diào)用方法也很簡(jiǎn)單：
GetDateDiff("2010-10-11 00:00:00", "2010-10-11 00:01:40", "day")
這個(gè)是計(jì)算天數(shù)
GetDateDiff("2010-10-11 00:00:00", "2010-10-11 00:01:40", "seond")是計(jì)算秒數(shù)

下面腳本之家小編再為大家分析一個(gè)不錯(cuò)的

<html> 
<script type="text/javascript"> 
alert(dealDate("2018-01-20","2018-01-28"));
//提示前面的日期小于后面的日期
function dealDate(date1,date2){
  date1 = new Date(date1);//如果傳進(jìn)來(lái)的是"yyyy-MM-dd"形式的字符串
  date2 = new Date(date2);
  var year1 = date1.getFullYear();
  var month1 = date1.getMonth()+1;
  var day1 = date1.getDate();
  var dateMax1 = new Date(year1,month1,0);
  var dayMax1 = dateMax1.getDate();
  var year2 = date2.getFullYear();
  var month2 = date2.getMonth()+1;
  var day2 = date2.getDate();
  var dateMax2 = new Date(year2,month2,0);
  var dayMax2 = dateMax2.getDate();
  if(day1==dayMax1&&day2==dayMax2){
  //開始日期和結(jié)束日期都是月底
  //直接計(jì)算月份差，推算幾年幾個(gè)月
    var res = (year2-year1)*12+(month2-month1);//月份差
    var difYear = Math.floor(res/12);
    var difMonth = res%12;
    return ((difYear!=0)?(difYear+"年"):"")+difMonth+"個(gè)月";
  }else if(day1==dayMax1&&day2<dayMax2){
  //開始日期是月底，結(jié)束日期不是
  //計(jì)算開始日期到結(jié)束日期上一個(gè)月的月底,再加上結(jié)束日期的天數(shù)
    var month3 = month2-1;
    var res = (year2-year1)*12+(month3-month1);//月份差
    var difYear = Math.floor(res/12);
    var difMonth = res%12;
    var difDay = day2;
    return ((difYear!=0)?(difYear+"年"):"")+((difMonth!=0)?(difMonth+"個(gè)月"):"")+difDay+"天";
  }else if(day1<dayMax1&&day2<dayMax2){
  //開始日期和結(jié)束日期都不是月底
  //情況1,day1<day2
    if(day1<=day2){
      var res = (year2-year1)*12+(month2-month1);//月份差
      var difYear = Math.floor(res/12);
      var difMonth = res%12;
      var difDay = day2-day1;
      return ((difYear!=0)?(difYear+"年"):"")+((difMonth!=0)?(difMonth+"個(gè)月"):"")+difDay+"天";
    }else{
      var month3 = month2-1;
      var res = (year2-year1)*12+(month3-month1);//月份差
      var difYear = Math.floor(res/12);
      var difMonth = res%12;
      var difDayTemp = day1-day2;
      var dateMax3 = new Date(year2,month3,0);
      var dayMax3 = dateMax3.getDate();
      var difDay = dayMax3-difDayTemp;
      return ((difYear!=0)?(difYear+"年"):"")+((difMonth!=0)?(difMonth+"個(gè)月"):"")+difDay+"天";
    }
  }
}
</script>
</html>

運(yùn)行測(cè)試返回天數(shù)的，大家可以根據(jù)需要參考上面的代碼修改即可。

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