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Simple Field Calculations

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I need to take the last 4 digits of a number entered into a field and put it into a hidden field.

I have created a standard text field for a social security number to be entered with the following formatting 999-99-9999.

I am looking for some help or guidance on how to take the last 4 digits from this field and place it into a hidden field.

Any guidance and direction would be greatly appreciated.

Thanks in advance.

This jQuery snippet will work:


jQuery(document).ready(function ($) {
"use strict";
/* change the xxxx to the id of the text field */
$("#field_xxxx").on('change', function() {
/* store last 4-digits in hidden field */
$("#field_yyyy").val( $(this).val().substr(-4, 4) );
});
});

Change field_xxxx to the field id of your text field. Change field_yyyy to the id of your hidden field. Copy the snippet into the after fields area on your form's settings/customize HTML page.

In the snippet above, make sure you wrap it in the script tags. They tags disappeared when the post was saved.

Thank you for the insight.  I am new to this whole formidable form thing.  If you don't mind me asking, where precisely do I place the jquery?

I'm sure my web guy could figure this out, but I'm trying to learn some of this myself for future use.

Thanks in advance.

Like I said in my post: "Copy the snippet into the after fields area on your form's settings/customize HTML page."

Worked like a charm.  Thank you for your help on this :)

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