Let’s take a look at the source code:
/**
* jscript.datetime package
* This package contains utility functions for working with dates and times.
* /
/*namespace*/
if (typeof jscript == 'undefined') {
jscript = function() { }
}
jscript.datetime = function( ) { }
/**
* This function will return the number of days in a given month and year,
* taking leap years into account.
*
* @param inMonth The month, where January = 1 and December = 12.
* @param inYear The year to check the month in.
* @return The number of days in the specified month and year.
*/
jscript.datetime.getNumberDaysInMonth = function(inMonth, inYear) {
inMonth = inMonth - 1;
var leap_year = this.isLeapYear(inYear);
if (leap_year) {
leap_year = 1;
} else {
leap_year = 0;
}
/*4, 6, 9 , November is 30 days, note the above inMonth = inMonth - 1*/
if (inMonth == 3 || inMonth == 5 || inMonth == 8 || inMonth == 10) {
return 30;
} else if (inMonth == 1) {/*2 month has 28 or 29 days, depending on whether it is a leap year*/
return 28 leap_year;
} else {/*Other months Then it is 31 days*/
return 31;
}
} // End getNumberDaysInMonth().
/**
* This function will determine if a given year is a leap year.
* (This function is used to determine whether it is a leap year)
* @param inYear The year to check.
* @return True if inYear is a leap year, false if not.
*/
jscript.datetime.isLeapYear = function(inYear) {
if ((inYear % 4 == 0 && !(inYear % 100 == 0)) || inYear % 400 == 0) {
return true;
} else {
return false;
}
} // End isLeapYear().
Statement:The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn