need help with this script

[adi]

1) Script Title: Jason's Date Input Calendar

2) Script URL (on DD): http://www.dynamicdrive.com/dynamici...oncalendar.htm

3) Describe problem:

<script>DateInput('dolazak', true, 'DD-MM-YYYY')</script>
<script>DateInput('odlazak', true, 'DD-MM-YYYY', '??????'</script>

I need to replace ????? in line 2 with something to take selected date from line 1 and select that +1