making a selection

[Stijn Goris]

hi all,

I have this simple problem:
A user has to select his 3 favorite numbers from a list of 100 numbers. I
want to show these numbers with some sort of checkbox. How can I create a
groep of checkboxes that are somehow linked in a way the user can only
select maximum 3 numbers?

I hope someone can help me out

thanks
Stijn

[Matt Kruse]

Re: making a selection

"Stijn Goris" <mepisto@hotmai l.com> wrote:[color=blue]
> How can I create a
> groep of checkboxes that are somehow linked in a way the user can only
> select maximum 3 numbers?[/color]

I have a reusable library called "CheckboxGr oup" which will do exactly this.
You can assign all the checkboxes to a group, and then limit the number of
boxes that can be checked. If you try to check more than the limit, it will
alert a message and not allow you to do so.

http://www.mattkruse.com/javascript/checkboxgroup/

Be aware, though, that you should also validate this on the server-side,
too, because someone may disable javascript in their browser and then be
able to pick as many as they want.

--
Matt Kruse
Javascript Toolbox: http://www.mattkruse.com/javascript/

[Stijn Goris]

Re: making a selection


"Matt Kruse" <newsgroups@mat tkruse.com> wrote in message
news:c6tg3i02ec f@news4.newsguy .com...[color=blue]
> "Stijn Goris" <mepisto@hotmai l.com> wrote:[color=green]
> > How can I create a
> > groep of checkboxes that are somehow linked in a way the user can only
> > select maximum 3 numbers?[/color]
>
> I have a reusable library called "CheckboxGr oup" which will do exactly[/color]
this.[color=blue]
> You can assign all the checkboxes to a group, and then limit the number of
> boxes that can be checked. If you try to check more than the limit, it[/color]
will[color=blue]
> alert a message and not allow you to do so.
> http://www.mattkruse.com/javascript/checkboxgroup/
>
> Be aware, though, that you should also validate this on the server-side,
> too, because someone may disable javascript in their browser and then be
> able to pick as many as they want.
>
> --
> Matt Kruse
> Javascript Toolbox: http://www.mattkruse.com/javascript/
>
>[/color]

This is indeed the stuff I need. Although it would be better I think if a
box is unchecked when the user checks another (fourth) box instead of giving
him a warning

[Matt Kruse]

Re: making a selection

"Stijn Goris" <mepisto@hotmai l.com> wrote:[color=blue]
> This is indeed the stuff I need. Although it would be better I think if a
> box is unchecked when the user checks another (fourth) box instead of[/color]
giving[color=blue]
> him a warning[/color]

How would you know which box to uncheck?

--
Matt Kruse
Javascript Toolbox: http://www.mattkruse.com/javascript/