javascript date and time function (classic + perfect + practical)_time and date

//------------------------------------------------ ----------
// Determining leap years
//-------------------------------- -----------------------
Date.prototype.isLeapYear = function()
{
return (0==this.getYear( )%4&&((this.getYear() 0!=0)||(this.getYear()@0==0)));
}
//-------- ---------------------------------------------
//Date format
//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 = ['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;
}
// ----- -----------------------------------------------
/ /| Find the difference in days between two times. The 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 date type or Valid date format string
// ---------------------------------------- -----------
Date.prototype.DateDiff = function(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 ();
}
}
//--------------------------------------------- ------
//| Date output string, overloaded the system's toString method
// -------------------------- -------------------------------
Date.prototype.toString = function(showWeek)
{
var myDate= this;
var str = myDate.toLocaleDateString();
if (showWeek)
{
var Week = ['日','一','二','三' ,'four','five','six'];
str = 'week' Week[myDate.getDay()];
}
return str;
}
// -------------------------------------------------- -
//| Date legality verification
//| The format is: YYYY-MM-DD or YYYY/MM/DD
// -------------- -------------------------------------
function IsValidDate(DateStr)
{
var sDate=DateStr.replace(/(^s |s $)/g,''); //remove spaces on both sides;
if(sDate=='') return true;
//if The format satisfies YYYY-(/)MM-(/)DD or YYYY-(/)M-(/)DD or YYYY-(/)M-(/)D or YYYY-(/)MM-(/)D Replace with ''
//In the database, the legal date can be: YYYY-MM/DD (2003-3/21), the database will automatically convert to YYYY-MM-DD format
var s = sDate.replace (/[d]{ 4,4 }[-/]{ 1 }[d]{ 1,2 }[-/]{ 1 }[d]{ 1,2 }/g,'');
if (s=='') //The description format satisfies YYYY-MM-DD or YYYY-M-DD or YYYY-M-D or YYYY-MM-D
{
var t=new Date(sDate.replace (/-/g,'/'));
var ar = sDate.split(/[-/:]/);
if(ar[0] != t.getYear() || ar [1] != t.getMonth() 1 || ar[2] != t.getDate())
{
//alert('Wrong date format! The format is: YYYY-MM-DD or YYYY/MM/DD. Pay attention to leap years. ');
return false;
}
}
else
{
//alert('Wrong date format! The format is: YYYY-MM-DD or YYYY/MM /DD. Note leap years.');
return false;
}
return true;
}
// ----------------------- -----------------------------
//| Date and time check
//| The format is: YYYY-MM -DD ​​HH:MM:SS
// ----------------------------------------------- -------------
function CheckDateTime(str)
{
var reg = /^(d )-(d{ 1,2 })-(d{ 1 ,2 }) (d{ 1,2 }):(d{ 1,2 }):(d{ 1,2 })$/;
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 the date into arrays
// ---------------------------------- ------------------
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 day w week ww week h hour n minute s second
// - --------------------------------------------------
Date.prototype.DatePart = function(interval)
{
var myDate = this;
var partStr='';
var Week = ['日','一',' two','three','four','five','six'];
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;
}
// -- --------------------------------------------------
//| Get the maximum number of days in the month of 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 week of the year that the current date is in
// -------------------------- --------------------------
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;
}
// ------- -----------------------------------------------
//| Convert string 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;
}