Set Date With Javascript

Question

I have 2 date fields, A and B.
What I need to do is once I tab out of A, I need to set B to A+1year-1day.
I can do this in a page process on submit with
ADD_MONTHS(:P_A, 12)-1
but I need this to be done on change of field A.
Any help appreciated
Gus

Answer 1

Hi Gus,
you need to provide the date format you are using.
Add this to your FIELD A "html form element attributes":
onblur="javascript:fnc_field_b(this)"Add this to your page header:
<script>
function fnc_field_b(v_field_a){
/* Input: mm/dd/yyyy */
/* Output: dd.mm.yyyy */
/* Documentation: http://www.javascriptkata.com/2007/04/27/mastering-of-the-date-object-in-javascript/ */
/*                http://programming.top54u.com/post/Javascript-Convert-String-to-Date.aspx            */
/* Create date object */
var myDate = new Date(v_field_a.value);
/* Add 1 year */
myDate.setDate(myDate.getDate() + 365);
/* Create output string DD.MM.YYYY */
/* Day */
var myStr = (myDate.getDate() < 10 ? "0" + myDate.getDate().toString() : myDate.getDate().toString()) +  ".";
/* Month */
    myStr = myStr + (myDate.getMonth()+1 < 10 ? "0" + (myDate.getMonth()+1).toString() : (myDate.getMonth()+1).toString()) + ".";
/* Year */
    myStr = myStr + myDate.getFullYear().toString();
/* Set value */
$s('P1_FIELD_B',myStr);
&lt;/script>Change the field P1_FIELD_B to the name of your field B name.
Best regards,
Tobias
Edited by: Tobias Arnhold on Mar 7, 2011 4:44 PM