Using getDate in input field, and displaying daysLeftUntil in another field...

Question

I am trying to use JS in an adobe form I created. I have a date field in which the user enters the current date. Then, in another field, the days left until the end of the year are displayed. I can do this great in HTML, but behavior in Acrobat isn't quite the same.

Here's what I have so far, but applying it proves difficult.

function DayDiff(StartDate)
{
    var TYear=StartDate.getFullYear();
        var TDay=new Date("January, 01, 2014");
        TDay.getFullYear(TYear);
        var DayCount=(TDay-StartDate)/(1000*60*60*24);
        DayCount=Math.round(DayCount); 
    return(DayCount);
}

try67 · Accepted Answer

Okay... So, I played around with the User Input part of the form a bit and put in different dates. If I put in a date where the days remaining in the year is a whole number, then it shows like 335 Days Left (I used 01/31/2013). But, when I put in tomorrow's date (02/01/2013), I get 334.00000001157406.

I think it might be something in the milliseconds calculation. What are your thoughts?

Yes, probably... Change this:

var diffDays = diffMs / oneDay;

To:

var diffDays = Math.floor(diffMs / oneDay);

try67 · Answer

First of all, what's the point of this line:

TDay.getFullYear(TYear);

? It doesn't change anything...

Furthermore, you should use the getTime() method on your Date objects to get the difference between them in ms, after which you can divide it to get the results in days (that you already do).

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