Date.prototype.isLeapYear 判斷閏年

Date.prototype.Format 日期格式化

Date.prototype.DateAdd 日期計算

Date.prototype.DateDiff 比較日期差

Date.prototype.toString 日期轉(zhuǎn)字符串

Date.prototype.toArray 日期分割為數(shù)組

Date.prototype.DatePart 取日期的部分信息

Date.prototype.MaxDayOfDate 取日期所在月的最大天數(shù)

Date.prototype.WeekNumOfYear 判斷日期所在年的第幾周

StringToDate 字符串轉(zhuǎn)日期型

IsValidDate 驗(yàn)證日期有效性

CheckDateTime 完整日期時間檢查

daysBetween 日期天數(shù)差

  <script>
    //---------------------------------------------------   
    // 判斷閏年   
    //---------------------------------------------------   
    Date.prototype.isLeapYear = function () {
      return (0 == this.getYear() % 4 && ((this.getYear() % 100 != 0) || (this.getYear() % 400 == 0)));
    }

    //---------------------------------------------------   
    // 日期格式化   
    // 格式 YYYY/yyyy/YY/yy 表示年份   
    // MM/M 月份   
    // W/w 星期   
    // dd/DD/d/D 日期   
    // hh/HH/h/H 時間   
    // mm/m 分鐘   
    // ss/SS/s/S 秒   
    //---------------------------------------------------   
    Date.prototype.Format = function (formatStr) {
      var str = formatStr;
      var Week = ['日', '一', '二', '三', '四', '五', '六'];

      str = str.replace(/yyyy|YYYY/, this.getFullYear());
      str = str.replace(/yy|YY/, (this.getYear() % 100) > 9 ? (this.getYear() % 100).toString() : '0' + (this.getYear() %
        100));

      str = str.replace(/MM/, this.getMonth() > 9 ? this.getMonth().toString() : '0' + this.getMonth());
      str = str.replace(/M/g, this.getMonth());

      str = str.replace(/w|W/g, Week[this.getDay()]);

      str = str.replace(/dd|DD/, this.getDate() > 9 ? this.getDate().toString() : '0' + this.getDate());
      str = str.replace(/d|D/g, this.getDate());

      str = str.replace(/hh|HH/, this.getHours() > 9 ? this.getHours().toString() : '0' + this.getHours());
      str = str.replace(/h|H/g, this.getHours());
      str = str.replace(/mm/, this.getMinutes() > 9 ? this.getMinutes().toString() : '0' + this.getMinutes());
      str = str.replace(/m/g, this.getMinutes());

      str = str.replace(/ss|SS/, this.getSeconds() > 9 ? this.getSeconds().toString() : '0' + this.getSeconds());
      str = str.replace(/s|S/g, this.getSeconds());

      return str;
    }

    //+---------------------------------------------------   
    //| 求兩個時間的天數(shù)差 日期格式為 YYYY-MM-dd    
    //+---------------------------------------------------   
    function daysBetween(DateOne, DateTwo) {
      var OneMonth = DateOne.substring(5, DateOne.lastIndexOf('-'));
      var OneDay = DateOne.substring(DateOne.length, DateOne.lastIndexOf('-') + 1);
      var OneYear = DateOne.substring(0, DateOne.indexOf('-'));

      var TwoMonth = DateTwo.substring(5, DateTwo.lastIndexOf('-'));
      var TwoDay = DateTwo.substring(DateTwo.length, DateTwo.lastIndexOf('-') + 1);
      var TwoYear = DateTwo.substring(0, DateTwo.indexOf('-'));

      var cha = ((Date.parse(OneMonth + '/' + OneDay + '/' + OneYear) - Date.parse(TwoMonth + '/' + TwoDay + '/' +
        TwoYear)) / 86400000);
      return Math.abs(cha);
    }


    //+---------------------------------------------------   
    //| 日期計算   
    //+---------------------------------------------------   
    Date.prototype.DateAdd = function (strInterval, Number) {
      var dtTmp = this;
      switch (strInterval) {
        case 's':
          return new Date(Date.parse(dtTmp) + (1000 * Number));
        case 'n':
          return new Date(Date.parse(dtTmp) + (60000 * Number));
        case 'h':
          return new Date(Date.parse(dtTmp) + (3600000 * Number));
        case 'd':
          return new Date(Date.parse(dtTmp) + (86400000 * Number));
        case 'w':
          return new Date(Date.parse(dtTmp) + ((86400000 * 7) * Number));
        case 'q':
          return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number * 3, dtTmp.getDate(), dtTmp.getHours(),
            dtTmp.getMinutes(), dtTmp.getSeconds());
        case 'm':
          return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(),
            dtTmp.getSeconds());
        case 'y':
          return new Date((dtTmp.getFullYear() + Number), dtTmp.getMonth(), dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(),
            dtTmp.getSeconds());
      }
    }

    //+---------------------------------------------------   
    //| 比較日期差 dtEnd 格式為日期型或者 有效日期格式字符串   
    //+---------------------------------------------------   
    Date.prototype.DateDiff = function (strInterval, dtEnd) {
      var dtStart = this;
      if (typeof dtEnd == 'string') //如果是字符串轉(zhuǎn)換為日期型   
      {
        dtEnd = StringToDate(dtEnd);
      }
      switch (strInterval) {
        case 's':
          return parseInt((dtEnd - dtStart) / 1000);
        case 'n':
          return parseInt((dtEnd - dtStart) / 60000);
        case 'h':
          return parseInt((dtEnd - dtStart) / 3600000);
        case 'd':
          return parseInt((dtEnd - dtStart) / 86400000);
        case 'w':
          return parseInt((dtEnd - dtStart) / (86400000 * 7));
        case 'm':
          return (dtEnd.getMonth() + 1) + ((dtEnd.getFullYear() - dtStart.getFullYear()) * 12) - (dtStart.getMonth() +
            1);
        case 'y':
          return dtEnd.getFullYear() - dtStart.getFullYear();
      }
    }

    //+---------------------------------------------------   
    //| 日期輸出字符串苇倡，重載了系統(tǒng)的toString方法   
    //+---------------------------------------------------   
    Date.prototype.toString = function (showWeek) {
      var myDate = this;
      var str = myDate.toLocaleDateString();
      if (showWeek) {
        var Week = ['日', '一', '二', '三', '四', '五', '六'];
        str += ' 星期' + Week[myDate.getDay()];
      }
      return str;
    }

    //+---------------------------------------------------   
    //| 日期合法性驗(yàn)證   
    //| 格式為：YYYY-MM-DD或YYYY/MM/DD   
    //+---------------------------------------------------   
    function IsValidDate(DateStr) {
      var sDate = DateStr.replace(/(^\s+|\s+$)/g, ''); //去兩邊空格;    
      if (sDate == '') return true;
      //如果格式滿足YYYY-(/)MM-(/)DD或YYYY-(/)M-(/)DD或YYYY-(/)M-(/)D或YYYY-(/)MM-(/)D就替換為''    
      //數(shù)據(jù)庫中，合法日期可以是:YYYY-MM/DD(2003-3/21),數(shù)據(jù)庫會自動轉(zhuǎn)換為YYYY-MM-DD格式    
      var s = sDate.replace(/[\d]{ 4,4 }[\-/]{ 1 }[\d]{ 1,2 }[\-/]{ 1 }[\d]{ 1,2 }/g, '');
      if (s == '') //說明格式滿足YYYY-MM-DD或YYYY-M-DD或YYYY-M-D或YYYY-MM-D    
      {
        var t = new Date(sDate.replace(/\-/g, '/'));
        var ar = sDate.split(/[-/:]/);
        if (ar[0] != t.getYear() || ar[1] != t.getMonth() + 1 || ar[2] != t.getDate()) {
          //alert('錯誤的日期格式！格式為：YYYY-MM-DD或YYYY/MM/DD。注意閏年。');    
          return false;
        }
      } else {
        //alert('錯誤的日期格式俄烁！格式為：YYYY-MM-DD或YYYY/MM/DD。注意閏年。');    
        return false;
      }
      return true;
    }

    //+---------------------------------------------------   
    //| 日期時間檢查   
    //| 格式為：YYYY-MM-DD HH:MM:SS   
    //+---------------------------------------------------   
    function CheckDateTime(str) {
      var reg = /^(\d+)-(\d{ 1,2 })-(\d{ 1,2 }) (\d{ 1,2 }):(\d{ 1,2 }):(\d{ 1,2 })$/;
      var r = str.match(reg);
      if (r == null) return false;
      r[2] = r[2] - 1;
      var d = new Date(r[1], r[2], r[3], r[4], r[5], r[6]);
      if (d.getFullYear() != r[1]) return false;
      if (d.getMonth() != r[2]) return false;
      if (d.getDate() != r[3]) return false;
      if (d.getHours() != r[4]) return false;
      if (d.getMinutes() != r[5]) return false;
      if (d.getSeconds() != r[6]) return false;
      return true;
    }

    //+---------------------------------------------------   
    //| 把日期分割成數(shù)組   
    //+---------------------------------------------------   
    Date.prototype.toArray = function () {
      var myDate = this;
      var myArray = Array();
      myArray[0] = myDate.getFullYear();
      myArray[1] = myDate.getMonth();
      myArray[2] = myDate.getDate();
      myArray[3] = myDate.getHours();
      myArray[4] = myDate.getMinutes();
      myArray[5] = myDate.getSeconds();
      return myArray;
    }

    //+---------------------------------------------------   
    //| 取得日期數(shù)據(jù)信息   
    //| 參數(shù) interval 表示數(shù)據(jù)類型   
    //| y 年 m月 d日 w星期 ww周 h時 n分 s秒   
    //+---------------------------------------------------   
    Date.prototype.DatePart = function (interval) {
      var myDate = this;
      var partStr = '';
      var Week = ['日', '一', '二', '三', '四', '五', '六'];
      switch (interval) {
        case 'y':
          partStr = myDate.getFullYear();
          break;
        case 'm':
          partStr = myDate.getMonth() + 1;
          break;
        case 'd':
          partStr = myDate.getDate();
          break;
        case 'w':
          partStr = Week[myDate.getDay()];
          break;
        case 'ww':
          partStr = myDate.WeekNumOfYear();
          break;
        case 'h':
          partStr = myDate.getHours();
          break;
        case 'n':
          partStr = myDate.getMinutes();
          break;
        case 's':
          partStr = myDate.getSeconds();
          break;
      }
      return partStr;
    }

    //+---------------------------------------------------   
    //| 取得當(dāng)前日期所在月的最大天數(shù)   
    //+---------------------------------------------------   
    Date.prototype.MaxDayOfDate = function () {
      var myDate = this;
      var ary = myDate.toArray();
      var date1 = (new Date(ary[0], ary[1] + 1, 1));
      var date2 = date1.dateAdd(1, 'm', 1);
      var result = dateDiff(date1.Format('yyyy-MM-dd'), date2.Format('yyyy-MM-dd'));
      return result;
    }

    //+---------------------------------------------------   
    //| 取得當(dāng)前日期所在周是一年中的第幾周   
    //+---------------------------------------------------   
    Date.prototype.WeekNumOfYear = function () {
      var myDate = this;
      var ary = myDate.toArray();
      var year = ary[0];
      var month = ary[1] + 1;
      var day = ary[2];
      document.write('< script language=VBScript\> \n');
      document.write('myDate = DateValue('
        '+month+' - '+day+' - '+year+'
        ') \n');
      document.write('result = DatePart('
        ww ', myDate) \n');
      document.write(' \n');
      return result;
    }

    //+---------------------------------------------------   
    //| 字符串轉(zhuǎn)成日期類型    
    //| 格式 MM/dd/YYYY MM-dd-YYYY YYYY/MM/dd YYYY-MM-dd   
    //+---------------------------------------------------   
    function StringToDate(DateStr) {

      var converted = Date.parse(DateStr);
      var myDate = new Date(converted);
      if (isNaN(myDate)) {
        //var delimCahar = DateStr.indexOf('/')!=-1?'/':'-';   
        var arys = DateStr.split('-');
        myDate = new Date(arys[0], --arys[1], arys[2]);
      }
      return myDate;
    }
  </script>

本文轉(zhuǎn)自博客園執(zhí)著的笨蛋的博客璃氢，原文鏈接：[轉(zhuǎn)]js日期時間函數(shù)(經(jīng)典＋完善＋實(shí)用)，如需轉(zhuǎn)載請自行聯(lián)系原博主录择。