Js obtains the current date and time and other operations

VarmyDatenewDate (); myDategetYear (); get the current year (2 digits) myDategetFullYear (); get the complete year (4 digits, 1970 -????) MyDategetMonth (); get the current month (0-11,

Var myDate = new Date (); myDate. getYear (); // obtain the current year (2 digits) myDate. getFullYear (); // obtain the complete year (4 digits, 1970 -????) MyDate. getMonth (); // obtain the current month (0-11, 0 represents January) myDate. getDate (); // obtain the current day (1-31) myDate. getDay (); // obtain the current day X (0-6, 0 represents Sunday) myDate. getTime (); // obtain the current time (milliseconds starting from 1970.1.1) myDate. getHours (); // obtain the current hour (0-23) myDate. getMinutes (); // get the current number of minutes (0-59) myDate. getSeconds (); // obtain the current number of seconds (0-59) myDate. getMilliseconds (); // get the current number of milliseconds (0-999) myDate. toLocaleDateString (); // obtain the current date var mytime = myDate. toLocaleTimeString (); // obtain the current time myDate. toLocaleStr Ing (); // obtain the method list of the script library of date and time. prototype. isLeapYear determines the Date of the leap year. prototype. format Date. prototype. dateAdd Date calculation Date. prototype. dateDiff compares the Date difference. prototype. toString Date to string Date. prototype. toArray Date is split into array Date. prototype. datePart obtains part of the Date information. prototype. maxDayOfDate is the maximum Date of the month in which the Date is located. prototype. weekNumOfYear judge the week of the year in which the date is located StringToDate string convert date type IsValidDate verify date validity CheckDateTime complete date time check daysBetween date day difference js Code ://------------- ------------------------------------ // Determine a leap year. // ----------------------------------------------------- Date. prototype. isLeapYear = function () {return (0 = this. getYear () % 4 & (this. get year () % 100! = 0) | (this. getYear () % 400 = 0 )));} // ------------------------------------------------- // format YYYY/yyyy/YY indicates the year // MM/M month // W/w weeks // dd/d/D date // hh/HH/h/H time // mm/m minutes // ss/SS/s/S seconds // --------------------------------------------------------- Date. prototype. format = function (formatStr) {var str = formatStr; var Week = ['day', 'yi', '2', '3', '4', '5 ', '6']; str = str. replace (/yyyy | YYYY/, this. ge TFullYear (); 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;} // + --------------------------------------------------- // | returns the date format of the two days difference: YYYY-MM-dd // + interval 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); ret Urn Math. abs (cha);} // + --------------------------------------------------- // | Date calculation // + ----------------------------------------------------- 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. pa Rse (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 () + Nu Mber, 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 () ;}/// + --------------------------------------------------- // | compare the dtEnd format with the Date format or the valid Date format string // + invalid Date. prototype. da TeDiff = function (strInterval, dtEnd) {var dtStart = this; if (typeof dtEnd = 'string ') // If the string is converted to the date type {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 pa RseInt (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 () ;}/// + ----------------------------------------------------- // | Date output string, reload the system's toString method // + 1_date. prototype. toString = function (sho WWeek) {var myDate = this; var str = myDate. toLocaleDateString (); if (showWeek) {var Week = ['day', 'yi', '2', '3', '4', '5 ', '6']; str + = 'Week' + Week [myDate. getDay ()];} return str;} // + --------------------------------------------------- // | date validity verification // | format: YYYY-MM-DD or YYYY/MM/DD // + ----------------------------------------------------- function IsValidDate (DateStr) {var sDate = DateStr. replace (/(^ \ s + | \ s + $) /G, ''); // remove spaces on both sides; if (sDate ='') return true; // if the format meets YYYY-(/) MM -(/) DD Or YYYY-(/) M-(/) D or YYYY-(/) MM -(/) D is replaced with ''// database, the valid date can be: YYYY-MM/DD (2003-3/21), the database will be automatically converted to the YYYY-MM-DD format var s = sDate. replace (/[\ d] {4, 4} [\-/] {1} [\ d] {1} [\-/] {1} [\ d] {1, 2} /g, ''); if (s ='') // The description format meets the YYYY-MM-DD or YYYY-M-DD or YYYY-M-D or YYYY-MM-D {var t = new Date (sDate. replace (/\-/g, '/'); var ar = sDate. split (/[-/:]/); I F (ar [0]! = T. getYear () | ar [1]! = T. getMonth () + 1 | ar [2]! = T. getDate () {// alert ('incorrect date format! Format: YYYY-MM-DD or YYYY/MM/DD. Pay attention to the leap year. '); Return false ;}} else {// alert (' incorrect date format! Format: YYYY-MM-DD or YYYY/MM/DD. Pay attention to the leap year. '); Return false;} return true;} // + --------------------------------------------------- // | Date and Time check // | format: YYYY-MM-DD HH: MM: SS // + ----------------------------------------------------- function CheckDateTime (str) {var reg =/^ (\ d +)-(\ d {1, 2})-(\ d {1 }) (\ 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;} // + ----------------------------------------------------- // | splits the Date into an array // + seasonal 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 ;} // + ------------------------------------------------- // | get date data // | the interval parameter indicates the data type. // | y, m, D, w, ww, week, h, n minutes, s, s/+ --------------------------------------------------- Date. prototype. datePart = function (interval) {var myDate = this; var partStr = ''; var Week = ['day', 'day', 'two', '3 ', '4', '5', '6']; 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;} // + ------------------------- ------------------------ // | Obtains the maximum number of days of the month in which the current Date is located. // + ------------------------------------------- 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;} // + -------------------------------- ------------------- // | Obtain the week of the current Date in the year. // + ------------------------------------------------------- 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 = DatePa Rt ('ww ', myDate) \ n'); document. write ('\ n'); return result ;} // + convert // | convert string to date type // | format: MM/dd/yyyy mm-dd-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 ;}