JavaScript time and Date function Classic Collection __ Block chain

Turn from: http://my.oschina.net/beer/blog/29832

Date Time Script Library method list Date.prototype.isLeapYear judgment Leap year Date.prototype.Format date format Date.prototype.DateAdd Date calculation Date.prototype.DateDiff Comparison Date Difference Date.prototype.toString date-to-string Date.prototype.toArray date split array Date.prototype.DatePart
Take a part of the date Date.prototype.MaxDayOfDate the maximum number of days of the month Date.prototype.WeekNumOfYear the date of the year Stringtodate string to date type Isvaliddate Validation Date validity checkdatetime Full date time check daysbetween date days difference JS code//-------------------------------------------------    
    --/Judgment Leap Year//---------------------------------------------------Date.prototype.isLeapYear = function () { Return (0==this.getyear ()%4&& (This.getyear ()%100!=0) | |    
(This.getyear ()%400==0));   
}//---------------------------------------------------//Date format//Format YYYY/YYYY/YY/YY = year//mm/m month W/W Week//dd/dd/d/d date//hh/hh/h/h time//mm/m minute//ss/ss/s/s second//------------------------------------ ---------------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; }    
   
//+---------------------------------------------------   
//| A two-time number of days difference date format is YYYY-MM-DD//+---------------------------------------------------function Daysbetween (dateone,date   
    Two) {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) {V   
    Ar 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 = func   
    tion (strinterval, dtend) {var dtstart = this;   
    if (typeof dtend = = ' string ')//if the string is converted to 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 (); }  
}   
   
//+---------------------------------------------------   
//| The 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; }   
   
//+---------------------------------------------------   
//| Date legality Verification//|     
    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 is replaced with the '//database, the legal date can be: Yyyy-mm/dd (2003-3/   21), the database is automatically converted to the YYYY-MM-DD format var s = sdate.replace (/[\d]{4,4}[\-/]{1}[\d]{1,2}[\-/]{1}[\d]{1,2}/g, ""); 
    if (s== ')//description format satisfies YYYY-MM-DD or YYYY-M-DD or yyyy-m-d or yyyy-mm-d {var t=new Date (Sdate.replace,    
        '/'));    
        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; }    
   
//+---------------------------------------------------   
//|  Dividing 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//| The parameter interval represents the data type//| Y year M month d days w weeks WW Week h when N minute 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 on which the current date//+---------------------------------------------------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; }   
   
//+---------------------------------------------------   
//|   
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+ ');   
    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 Strin Gtodate (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;  }

More information: http://www.acwind.net/blog/?p=1120