u need to check from the server side (database) for
the duplicate values and popup a messg window to the
client abt that the record already exists ! if he hits
twice or more. (i think all the database applications
has the function to check for duplicate values.)
unless if u want to do in the client side itself then
u need to do a lot like storing the values
temporarily, if the user hits submit check these
values with already stored values, if not matching
then u can pass those values to the server, otherwise
u can stop the user ....
hope i've given atleast an idea.
cheers
shan.
--- Chin Cedric Sung Kit <[EMAIL PROTECTED]> wrote:
> hi,
>
> this is off-topic. i would like to know is there
> anyway to prevent the
> user from hitting the submit button more than once?
> because if the user
> clicks twice or more, one or more duplicated data
> will be sent to the
> servlets; and duplicated data will be written into
> the database as
> well....
>
> is there anyway to prevent this?
>
> thanks
>
> regards,
> ced
>
>
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