Javascript: How to extract data from 2 fields into 1?

[#1]

I am trying to extract a start date and return date into one field to show travel date. These text-boxes are formatted as Date fields except for Travel Date. one is (departure) and the other is (return). I want to extract these two fields into one field so that the travel date text-box is: ("departure" - "return").

Below is what I currently have however it is not working.

var sDate = this.getField("text4").value;

var rDate = this.getField("text15").value;

var tDate = this.getField("dateTravel").value;

tDate.value = sDate.value + " - " + rDate.value;

[#2]

You almost have it:

Use the following as the custom calculation script in your target field:

event.value = sDate + " - " + rDate;

You already got the value property of the field, so you don't have to do that again when you concatenate your strings.

[#3]

I tried that however data is still not filling in the dateTravel text-box. Do you think It might be because I have the sDate & rDate text-boxes formatted as date fields?

[#4]

No, that's not it. Check the JS Console (Ctrl+J) for error messages, though.

[#5]

Thank you, the error message I am recieving is TypeError: this.getField(...) is null 1:Field:Blur.

​Is it saying that the field I am trying to retrieve is empty or does not contain data? Because I have dates in there.

[#6]

That means the field name you used is incorrect.

[#7]

I went back and changed the text-box field names for ease of use. I changed "text4" to "Depart_Date" and "text15" to "Return_Date"

[#8]

correct code:

var sDate = getField("Depart_Date");

var rDate = getField("Return_Date");

var tDate = getField("Travel_Date");

tDate.value = sDate.value + " - " + rDate.value;

place this Javascript code under the "Return_Date" textbox

[#9]

That's not a good way of doing it. It means that it won't update the "Travel_Date" field when you update the "Depart_Date" field, for example.

Instead of doing it like that change the code to this and put it under the calculation event of the "Travel_Date" field:

var sDate = getField("Depart_Date");

var rDate = getField("Return_Date");

event.value = sDate.value + " - " + rDate.value;

[#10]

Thank you!!! How would you go about creating date validation so that "Depart_Date < Return_Date" always?

[#11]

You need to convert the date strings to JavaScript date object and compare the values of the 2 fields.

var cDepartDate = this.getField("Depart_Date").value;

var cReturnDate = this.getField("Return_Date").value;

event.value = "";

var cDateFormat = "dd=mmmm=yyyy";

if(cDepartDate != "" && cReturnDate != ""){

     var oDepartDate = util.scand(cDateFormat, cDepartDate);

     var oReturnDate = util.scand(cDateFormat, cReturnDate);

     if(oReturnDate.getTime() > oDepartDate.getTime()){

          event.value = cDepartDate + " - " + cReturnDate;

     } else {

          app.alert("Return date must be same or after departure date!", 1, 0);

     }

}

You may need to adjust the date format to the date format of your fields. It is best to use a 4 digit year in the format.