At 12:56 PM -0500 1/8/08, Nathan Nobbe wrote:
i agree, but rather than using spaces, or allowing them in the input string,
i prefer to have several focused form fields that comprise a larger element.
for example, a credit card number is 4 units of 4 digits. my preference for
credit card number entry is to have 4 text inputs which take 4
characters each.
this is not only convenient from a user perspective in the user
interface, but also
on the server side. its safe to call trim() on each sequence of
characters and
concatenate them. if any character is not a digit then immediately
the data is known
to be invalid (obviously additional checks are important as well
[and no more difficult
to perform than if a single form element was used to collect the data]).
ive also seen sites that will use javascript to monitor the
character count in each
of these smaller form elements and move the cursor to the subsequent
form element
once the current one is full. i have mixed feelings, that generally
boil down to particular
implementations on this design decision; sometimes it works,
sometimes it doesnt. but
thats up to the designer on a case by case basis. in general i urge
clients to have
several small form fields when reasonable. it reduces confusion for
the user, and
headaches for the (server side;)) developer.
-nathan
Ahh yes, an excellent idea.
Thanks,
tedd
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