来看看源码：
复制代码 代码如下:
if (typeof jscript == 'undefined') {
jscript = function() { }
}
jscript.datetime = function() { }
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;
}
if (inMonth == 3 || inMonth == 5 || inMonth == 8 || inMonth == 10) {
return 30;
} else if (inMonth == 1) {
return 28 + leap_year;
} else {
return 31;
}
} // End getNumberDaysInMonth().
jscript.datetime.isLeapYear = function(inYear) {
if ((inYear % 4 == 0 && !(inYear % 100 == 0)) || inYear % 400 == 0) {
return true;
} else {
return false;
}
} // End isLeapYear().
