javascript日期時間函數(shù)(全)
    日期時間腳本庫方法列表
    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 驗證日期有效性
    CheckDateTime 完整日期時間檢查
    daysBetween 日期天數(shù)差
    js 代碼
    //---------------------------------------------------
    // 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，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+$)/g,''); //去兩邊空格;
    if(sDate=='') return true;
    //如果格式滿足YYYY-(/)MM-(/)DD或YYYY-(/)M-(/)DD或YYYY-(/)M-(/)D或YYYY-(/)MM-(/)D就替換為''
    //數(shù)據(jù)庫中，合法日期可以是:YYYY-MM/DD(2003-3/21),數(shù)據(jù)庫會自動轉(zhuǎn)換為YYYY-MM-DD格式
    var s = sDate.replace(/[\d]{ 4,4 }[\-/]{ 1 }[\d]{ 1,2 }[\-/]{ 1 }[\d]{ 1,2 }/g,'');
    if (s=='') //說明格式滿足YYYY-MM-DD或YYYY-M-DD或YYYY-M-D或YYYY-MM-D
    {
    var t=new Date(sDate.replace(/\-/g,'/'));
    var ar = sDate.split(/[-/:]/);
    if(ar[0] != t.getYear() || ar[1] != t.getMonth()+1 || ar[2] != t.getDate())
    {
    //alert('錯誤的日期格式！格式為：YYYY-MM-DD或YYYY/MM/DD。注意閏年。');
    return false;
    }
    }
    else
    {
    //alert('錯誤的日期格式！格式為：YYYY-MM-DD或YYYY/MM/DD。注意閏年。');
    return false;
    }
    return true;
    }
    //+---------------------------------------------------
    //| 日期時間檢查
    //| 格式為：YYYY-MM-DD HH:MM:SS
    //+---------------------------------------------------
    function CheckDateTime(str)
    {
    var reg = /^(\d+)-(\d{ 1,2 })-(\d{ 1,2 }) (\d{ 1,2 }):(\d{ 1,2 }):(\d{ 1,2 })$/;
    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;
    }