+=item ut_alphasn COLUMN
+
+Check/untaint alphanumeric strings, spaces allowed. May be null. If there is
+an error, returns the error, otherwise returns false.
+
+=cut
+
+sub ut_alphasn {
+ my($self,$field)=@_;
+ $self->getfield($field) =~ /^([\w ]*)$/
+ or return "Illegal (alphanumeric) $field: ". $self->getfield($field);
+ $self->setfield($field,$1);
+ '';
+}
+
+