Restrict total of selectable values for checkbox or Dropdown

Hi,
is it possible to restrict the total of selectable values?
For example:
I have a dropdown with 8 options.
I want that the user only can select three of them.

The same for checkboxes. I have a checkbox element with 8 options and the user should only be able to select three of them.

Thanks in Advance!
Sting

Hi Sting,

This is possible - I found a script here that looks as though it could be adapted fairly easily. The main thing you need to think about it what you want to happen if there are too many options. I think this script just shows an Alert message.

Bob

Thanks!
I will give it a try.