input extension is consisted of two WCSS properties:
-wap-input-format and -wap-input-required.
If you are familiar with
WML mobile Internet application development, you will know that the
<input> WML element contains the format attribute and the
emptyok attribute. The format attribute defines the type and number
of characters that a user can enter in an input field, and the
emptyok attribute defines whether an input field can be left empty.
In XHTML MP, the format attribute and the emptyok attribute are not
included in the <input> element any more and their
corresponding function has been moved to WAP CSS. The
-wap-input-format and -wap-input-required properties are used to
replace the format attribute and the emptyok attribute respectively.
earlier mobile devices' WAP browser does not support the
-wap-input-format and -wap-input-required WCSS properties, but
supports the format attribute and the emptyok attribute as an
extension to XHTML MP. If you want to ensure that your XHTML MP page
functions correctly in the WAP browser of most mobile devices, you
may want to include both the WCSS property and the WML attribute in
the same element. For example,
type="text" format="N" style='-wap-input-format:
both the -wap-input-format WCSS property and the format attribute (or
the -wap-input-required WCSS property and the emptyok attribute) are
specified in the same XHTML MP element and their values are
different, the WCSS property takes precedence.
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