On the page that works you use the term;
You did not enter a valid 5-digit U.S. Zip Code. Please try again.
but on the broken page the text;
You didn’t enter a valid 5-digit U.S. Zip Code. Please try again.
The single quote in the text (didn’t) is causing the JavaScript to fail as the text is enclosed in single quotes in the code.
Change the broken text to use ‘did not’ and the validation should work again.
Regards,
Tim.
On 23 Jan 2012, at 17:08, Solutions Etcetera wrote: