Calculating Dates

[strtech]

I am trying to subtract two date fields that I thought would be very easy. I'm creating a form in Adobe Acrobat. However, I am either coming up with a blank field or the "NaN" message and I don't know why.

Both of my fields are formatted as a date field. My calculation field is formatted as a general field. I have searched the internet and am still coming up short.

Here is my code:

var b=getField("901d").value;
var e=getField("901e").value
var Begdate=new Date(b);
var Enddate=new Date(e);
var difference=(Begdate-Enddate)/86400000;
event.value=difference + " days";


Can anyone see the problem?

Thanks in advance.

 

[tsuji]

I don't think the form reference is omnipresence. Maybe you should add the reference this?
[tt] var b=[red]this.[/red]getField("901d").value;
var e=[red]this.[/red]getField("901e").value
[/tt]

 

[dkm666]

The second thing to check is whether your function getField() is returning a string or a number. The date() constructor will accept either one, but does different things depending on which type its argument is.