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Often times it is necessary to determine the number of days that have elapsed between
a start and an end date range. An additional array could be read for additional holidays
during which businesses are closed. However for the purposes of this article only the
weekends will be excluded from the count of days in the range of dates. The function below
is useful when time-sensitivity accounts for business days only. E.g. The number of business
days to process the delivery of an order from the current date to the expected date of delivery.
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function get_business_days (date_start, date_end)
{
var bdays = 0;
while (date_start <= date_end)
{
if (date_start.getDay () != 0 && date_start.getDay () != 6)
bdays++; // increment business days (exclude weekend)
date_start.setDate (date_start.getDate () + 1);
}
return bdays;
}
Code View - dynamicreport.com
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Obtain the date components from each input textbox and calculate the remaining business days
from today to the date provided.
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function test_dates ()
{
var bdays;
var y = 1 * document.getElementById ("y").value;
var m = 1 * document.getElementById ("m").value - 1; // 0 = 1st
var d = 1 * document.getElementById ("d").value;
var date_today = new Date ();
var date_target = new Date ();
date_target.setFullYear (y, m, d);
bdays = get_business_days (date_today, date_target);
alert ("A total of " + bdays + " business days will elapse from today.");
}
Code View - dynamicreport.com
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