JS Date Time processing Custom function

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//--------------------------------------------------- Judging leap years //--------------------------------------------------- Date.prototype.isLeapYear = function () { Return (0==this.getyear ()%4&& (This.getyear ()%100!=0) | | (This.getyear ()%400==0)); } //--------------------------------------------------- Date formatting Format Yyyy/yyyy/yy/yy represents year Mm/m Month W/W Week dd/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 ', ' one ', ' two ', ' three ', ' four ', ' five ', ' six ']; Str=str.replace (/yyyy| Yyyy/,this.getfullyear ()); Str=str.replace (/yy| yy/, (this.getyear ()%) >9? (This.getyear ()%). 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; } //+--------------------------------------------------- //| The number of days for two time difference date format is 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); } //+--------------------------------------------------- //| 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.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 ()); } } //+--------------------------------------------------- //| Compare Date Difference dtend format is a date type or a valid date format string //+--------------------------------------------------- Date.prototype.DateDiff = function (Strinterval, dtend) { var dtstart = this; if (typeof dtend = = ' string ')//if the string is converted to a 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 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 (); } } //+--------------------------------------------------- //| Date output string that overloads the system's ToString method //+--------------------------------------------------- Date.prototype.toString = function (Showweek) { var mydate= this; var str = mydate.tolocaledatestring (); if (Showweek) { var Week = [' Day ', ' one ', ' two ', ' three ', ' four ', ' five ', ' six ']; STR + + ' Week ' + week[mydate.getday ()]; } return str; } //+--------------------------------------------------- //| Validation of date legality //| Format is: YYYY-MM-DD or YYYY/MM/DD //+--------------------------------------------------- function Isvaliddate (DATESTR) { var sdate=datestr.replace (/(^s+|s+$)/g, ""); Go to both sides of the space; if (sdate== ') return true; If the format satisfies the yyyy-(/) mm-(/) DD or yyyy-(/) m (/) DD or yyyy-(/) m (/) d or yyyy-(/) mm-(/) d, replace with ' database, the legal date can be: Yyyy-mm/dd (2003-3/21), and the database is automatically converted to YYYY-MM-DD format var s = sdate.replace (/[d]{4,4}[-/]{1}[d]{1,2}[-/]{1}[d]{1,2}/g, "); if (s== ')//description format meets 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 (/[-/:]/); if (Ar[0]!= t.getyear () | | ar[1]!= t.getmonth () +1 | | ar[2]!= t.getdate ()) { Alert (' Wrong date format! The format is: Yyyy-mm-dd or YYYY/MM/DD. Notice leap year. '); return false; } } Else { Alert (' Wrong date format! The format is: Yyyy-mm-dd or YYYY/MM/DD. Notice leap year. '); return false; } return true; } //+--------------------------------------------------- //| Date Time Check //| Format is: 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; } //+--------------------------------------------------- //| Split dates into groups //+--------------------------------------------------- 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 information //| Parameter interval representing data types //| Y year M month D Day W week WW Week h when N minutes s sec //+--------------------------------------------------- Date.prototype.DatePart = function (interval) { var mydate = this; var partstr= '; var Week = [' Day ', ' one ', ' two ', ' three ', ' four ', ' five ', ' six ']; Switch (interval) { Case ' y ':p artstr = Mydate.getfullyear (); Case ' m ':p artstr = Mydate.getmonth () +1;break; Case ' d ':p artstr = Mydate.getdate (); Case ' W ':p artstr = Week[mydate.getday ()];break; Case ' ww ':p artstr = Mydate.weeknumofyear (); Case ' h ':p artstr = mydate.gethours (); Case ' n ':p artstr = Mydate.getminutes (); Case ' s ':p artstr = Mydate.getseconds (); } return partstr; } //+--------------------------------------------------- //| Gets the maximum number of days of the month where the current date is //+--------------------------------------------------- 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; } //+--------------------------------------------------- //| To get the current date the week is the week ordinal of 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 = DatePart (' ww ', mydate) n '); document.write (' n '); return result; } //+--------------------------------------------------- //| string is converted to date type //| Format 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; }

Date.prototype.isLeapYear Judge Leap Year
Date.prototype.Format Date format
DATE.PROTOTYPE.DATEADD Date Calculation
Date.prototype.DateDiff Comparison Date Difference
Date.prototype.toString Date-turn string
Date.prototype.toArray date split into arrays
Date.prototype.DatePart some information about the date
Date.prototype.MaxDayOfDate the maximum number of days of the month from which the date is taken
Date.prototype.WeekNumOfYear the first weeks of the year in which the date is judged
Stringtodate String Turn Date type
Isvaliddate Validation Date Validity
Checkdatetime Full Date Time check
Daysbetween Date Days Bad