Hi, javascript has an 'xor' operator. It works just like 'or' in an 'if'
statement except in 'xor' only one side can be true. In a normal 'or'
statement either side can be true or both can. So you probably want to do
something like: if ( A XOR B) { } .  Then only one can be true to continue
if both are true the statement returns 'false'.Hope this helps.
DED

On Sat, Oct 10, 2009 at 10:37 PM, Phper <hi.steven...@gmail.com> wrote:

>
> There are two input fields in a form, but only one of them is
> required, they are not required at the same time. Either A or B is
> required. ( A is required  OR B is required). In other words, a user
> can input data to field A, or he can input data to filed B, but he can
> not input data to Both A and B at the same time.
>
> How to implement this constraint in Jquery form validation?

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