I came across the following function which is used to calculate the difference between two dates in business days, i.e. by eliminating standard weekends / Saturdays and Sunday (source: http://partialclass.blogspot.ie/2011/07/calculating-working-days-between-two.html):

```
function workingDaysBetweenDates(startDate, endDate)
{
if (endDate < startDate)
return 0;
var millisecondsPerDay = 86400 * 1000;
startDate.setHours(0,0,0,1);
endDate.setHours(23,59,59,999);
var diff = endDate - startDate;
var days = Math.ceil(diff / millisecondsPerDay);
var weeks = Math.floor(days / 7);
var days = days - (weeks * 2);
var startDay = startDate.getDay();
var endDay = endDate.getDay();
if (startDay - endDay > 1)
days = days - 2;
if (startDay == 0 && endDay != 6)
days = days - 1
if (endDay == 6 && startDay != 0)
days = days - 1
return days;
alert(days);
}
```

Can someone tell me how I can pass two dates to call this function ? My dates would be variables in the format YYYY-MM-DD.

Many thanks for any help with this, Tim