Minor Description
ntegerField accept also not numeric input
IntegerField in Big Form example don't allow to set
alphabetic char, but special char as ? öèü are allowed.
on http://www.avoka.com/examples/big-form.htm
"Customer Number" field you can set for example: ? öäè
the page display than correctely the error msg. that
this isn't a number value, but controlling this before
the check will be more usefull.