Js獲取當前日期時間及其它操做

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表明1月)
myDate.getDate();        //獲取當前日(1-31)
 myDate.getDay();         //獲取當前星期X(0-6,0表明星期天)
myDate.getTime();        //獲取當前時間(從1970.1.1開始的毫秒數)
myDate.getHours();       //獲取當前小時數(0-23)
 myDate.getMinutes();     //獲取當前分鐘數(0-59)
 myDate.getSeconds();     //獲取當前秒數(0-59)
 myDate.getMilliseconds();    //獲取當前毫秒數(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

 

腳本庫方法列表

.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 日期轉字符串
Date.prototype.toArray 日期分割爲數組
Date.prototype.DatePart 取日期的部分信息
Date.prototype.MaxDayOfDate 取日期所在月的最大
Date.prototype.WeekNumOfYear 判斷日期所在年的第幾周
StringToDate 字符串轉日期型
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;   
 }   
   
 //+---------------------------------------------------  
 //| 求兩個時間的天數差 日期格式爲 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 格式爲日期型或者 有效日期格式字符串  
 //+---------------------------------------------------  
Date.prototype.DateDiff = function(strInterval, dtEnd) {   
     var dtStart = this;  
     if (typeof dtEnd == 'string' )//若是是字符串轉換爲日期型  
     {   
         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  
 //| 格式爲：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;   
     //若是格式知足YYYY-(/)MM-(/)DD或YYYY-(/)M-(/)DD或YYYY-(/)M-(/)D或YYYY-(/)MM-(/)D就替換爲''   
     //數據庫中，合法日期能夠是:YYYY-MM/DD(2003-3/21),數據庫會自動轉換爲YYYY-MM-DD格式   
     var s = sDate.replace(/[\d]{ 4,4 }[\-/]{ 1 }[\d]{ 1,2 }[\-/]{ 1 }[\d]{ 1,2 }/g,'');   
     if (s=='') //說明格式知足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！格式爲：YYYY-MM-DD或YYYY/MM/DD。注意閏年。');   
             return false;   
         }   
     }   
     else   
     {   
         //alert('錯誤的日期格式！格式爲：YYYY-MM-DD或YYYY/MM/DD。注意閏年。');   
         return false;   
     }   
     return true;   
 }   
   
 //+---------------------------------------------------  
 //| 日期時間檢查  
 //| 格式爲：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;  
 }  
   
 //+---------------------------------------------------  
 //| 取得日期數據信息  
 //| 參數 interval 表示數據類型  
 //| 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  
 //+---------------------------------------------------  
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;  
 }