thellie
Member
Hey
I've been given some code which allows me to limit the date selection to only the first and third Monday of each calendar month.
I think it needs adapting to work inside the 'Allow date function' field, but I don't know what to change or how... could anyone help please?
I've been given some code which allows me to limit the date selection to only the first and third Monday of each calendar month.
I think it needs adapting to work inside the 'Allow date function' field, but I don't know what to change or how... could anyone help please?
Code:
// test: first monday of this month
// result: true
//var dates = [new Date(2017,8,4)];
// test: third monday of this month
// result: true
//var dates = [new Date(2017,8,18)];
// test: first and third monday of this month
// result: true
var dates = [new Date(2017,8,4), new Date(2017,8,18)];
// test: first monday, third monday, and random day from this month
// result: false
//var dates = [new Date(2017,8,4), new Date(2017,8,18), new Date(2017,8,22)];
alert(validate(dates));
function validate(dates) {
var valid = true;
var mondays = getMondays();
var firstMonday = mondays[0].setHours(0,0,0,0);
var thirdMonday = mondays[2].setHours(0,0,0,0);
if (dates && dates.length > 0) {
for (var i = 0; i < dates.length; i++) {
// Zero out time so only year, month, and day is compared
var d = dates[i].setHours(0,0,0,0);
if (d != firstMonday && d != thirdMonday) {
return false;
}
}
}
else {
valid = false;
}
return valid;
}
function getMondays() {
var d = new Date(),
month = d.getMonth(),
mondays = [];
d.setDate(1);
// Get the first Monday in the month
while (d.getDay() !== 1) {
d.setDate(d.getDate() + 1);
}
// Get all the other Mondays in the month
while (d.getMonth() === month) {
mondays.push(new Date(d.getTime()));
d.setDate(d.getDate() + 7);
}
return mondays;
}