Javascript - Add Business Days To A User Selected Date

I need to add user defined business days to a user defined date and for it to display in an alert box. Could you please look at my code and let me know what needs changing: See JSF

Solution 1:

For a start write a function that takes the selected date and days:

<center>Select Business Days To Add<br><selectname="coll"id="t1"><optionvalue="1">1</option><optionvalue="2">2</option><optionvalue="3">3</option></select><p><scriptsrc="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script><script>  $(function() {    $( "#datepicker" ).datepicker(); });
    functiongetSelectedDate() {
           var day = $("#datepicker").datepicker("getDate");     
           var daysToAdd = $("#t1").val();
           returnNumber(daysToAdd) + Number(day.getDate());
        }
    </script><inputid="datepicker"onchange="alert(getSelectedDate());"/>

I suppose business days mean from monday to friday, so adding 1 to friday would mean actually monday and not saturday.

Further

• you need to look if the current day is friday and add two days to the selected business days to jump over the weekend - use getDate()
• if it is end of the month (regarding even and uneven months 30 and 31 days and february on leap and not leap year) and if needed increment the month too - use getMonth
• if it is end of the year, increment the year - use getFullYear

The code (without the check for weekends) looks like this:

<center>Select Business Days To Add<br><selectname="coll"id="t1"><optionvalue="1">1</option><optionvalue="2">2</option><optionvalue="3">3</option></select><p><scriptsrc="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script><script>  $(function() {    $( "#datepicker" ).datepicker(); });

        functionisEndOfMonth(date) {
        // day of month from 1 to 31var selectedDay = date.getDate();
        // months with 31 daysif (date.getMonth() == 0 || date.getMonth() == 2 || 
            date.getMonth() == 4 || date.getMonth() == 6 || 
            date.getMonth() == 7 || date.getMonth() == 9 || 
            date.getMonth() == 11) {
            return selectedDay == 31;
        }
        // february 28 / 29 days TODO check for leap year!if (date.getMonth() == 1) { return selectedDay == 28; }

        // months with 30 daysif (date.getMonth() == 3 || date.getMonth() == 5 || 
            date.getMonth() == 8 || date.getMonth() == 10) {
            return selectedDay == 30;
        }
            returnfalse;
        }

        functionisEndOfYear(month) {
            return month > 11;
        }

        functiongetSelectedDate() {
           var day = $("#datepicker").datepicker("getDate");

           var daysToAdd = Number($("#t1").val());
           // values from which the new date is constructedvar selectedMonth = day.getMonth();
           var selectedYear = day.getFullYear();
           var selectedDay = day.getDate();
           // if (isEndOfMonth(day)) {
               // start new month
               selectedDay = 1;
               selectedMonth++;
               if (isEndOfYear(selectedMonth)) {
                   // start new year
                   selectedYear++;
               }
           }
            // add business days
            selectedDay += daysToAdd;
            // TODO check if the result is weekend and jump over it. After a jump the same checks as above should be called!returnnewDate(selectedYear, selectedMonth, selectedDay, 0, 0, 0, 0);
        }
    </script><inputid="datepicker"onchange="alert(getSelectedDate());"/>

If for example the selected date is 14.Oct.2013, selected days 2, the function yields 16.Oct.2013.