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]

"Stijn Goris" <me*****@hotmail.com> wrote:

How can I create a
groep of checkboxes that are somehow linked in a way the user can only
select maximum 3 numbers?

I have a reusable library called "CheckboxGroup" 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]

"Matt Kruse" <ne********@mattkruse.com> wrote in message
news:c6*********@news4.newsguy.com...

"Stijn Goris" <me*****@hotmail.com> wrote:

How can I create a
groep of checkboxes that are somehow linked in a way the user can only
select maximum 3 numbers?
I have a reusable library called "CheckboxGroup" 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/

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]

"Stijn Goris" <me*****@hotmail.com> wrote:

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

How would you know which box to uncheck?

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