Topic: Two Input Fields Sharing Information

Hi Everyone,

quick question....

I am having someone develop an online store for me, I am wondering if it is possible to have two input fields that could share the same information. 

To clarify, I would have a list of special products listed at the top of the site that the user would be able to place in an amount.  The same product would be listed lower on the site again as part of the general product listing and would have another input field there as well.  What I am hoping for, is that if they place the amount in the first field it is reflected down below in the second field.  But also if they typed one amount in the top field they could change it by changing the amount in the second field, as well as the other way around.

I hope this all makes sense, and i assure you there is a major reason for the purpose of this feature, although it may appear more trouble than it is worth to some.

Thanks for your time,