readonly attribute problem in validation

Hi,

When I run my XSL-transformed code through the XHMTML validator, I get a
complaint saying that 'value of attribute "readonly" cannot be "1"; must be
one of "readonly"'. I guess that means instead of <input readonly="1"> I
must output it as <input readonly>. However, XSL forbids me to do this, or
at the very least XMLSpy complains like heck when I try to save. How can I
get by this?

Thanks!
Wong