內(nèi)置的Date函數(shù)

var mydate = new Date();
mydate.getYear(); //獲取當前年份(2位)
mydate.getFullYear(); //獲取完整的年份(4位,1970-????)
mydate.getMonth(); //獲取當前月份(0-11,0代表1月)
mydate.getDate(); //獲取當前日(1-31)
mydate.getDay(); //獲取當前星期X(0-6,0代表星期天)
mydate.getTime(); //獲取當前時間(從1970.1.1開始的毫秒數(shù))
mydate.getHours(); //獲取當前小時數(shù)(0-23)
mydate.getMinutes(); //獲取當前分鐘數(shù)(0-59)
mydate.getSeconds(); //獲取當前秒數(shù)(0-59)
mydate.getMilliseconds(); //獲取當前毫秒數(shù)(0-999)
mydate.toLocaleDateString(); //獲取當前日期
var mytime=mydate.toLocaleTimeString(); //獲取當前時間
mydate.toLocaleString( ); //獲取日期與時間

擴展函數(shù)

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

//---------------------------------------------------
// 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))/800000);
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) + (800000 * Number));
case 'w' :return new Date(Date.parse(dtTmp) + ((800000 * 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) / 800000);
case 'w' :return parseInt((dtEnd - dtStart) / (800000 * 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; }