Dear WHAT WG
When using
<input type=checkbox>
or
<select multiple>
one somtimes wants to limit the number of selected check boxes or
options. I have no idea how to model this with |input|, but |select|
could adopt the |min| and |max| attributes. They would not limit the
content of |value| but the number of selected |option|s, which is
similar to what is already specified for file upload controls. A
common and special case would be setting the same value on both
attributes to require a certain number of options to be selected.
I'd really like it if someone could come up with a way to make this
work with |input|, too.
