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

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

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

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.

CODE -->

function DayDiff(StartDate)
	var TYear=CurrentDate.getTime();
        var TDay=new Date("January, 01, 2014");
        var DayCount=(TDay-StartDate)/(1000*60*60*24);

Update: Still playing around with it...
However, I'm unable to have a user enter the date in one input box and have it output the number of days between that input date and the end of the year... How do I make that display happen. It's just not working for me. I have the display field set as "hidden but printable"...does that make any difference?
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